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Classes
struct	ConstFixedBlockXpr< Rows, Cols >

struct	ConstFixedSegmentReturnType< Size >

struct	ConstNColsBlockXpr< N >

struct	ConstNRowsBlockXpr< N >

struct	FixedBlockXpr< Rows, Cols >

struct	FixedSegmentReturnType< Size >

struct	NColsBlockXpr< N >

struct	NRowsBlockXpr< N >

Typedefs
typedef Block< Derived >	BlockXpr

typedef Block< Derived, internal::traits< Derived >::RowsAtCompileTime, Dynamic, !IsRowMajor >	ColsBlockXpr

typedef Block< Derived, internal::traits< Derived >::RowsAtCompileTime, 1, !IsRowMajor >	ColXpr

typedef Block< const Derived, IsRowMajor?1:Dynamic, IsRowMajor?Dynamic:1, true >	ConstInnerVectorReturnType

typedef Block< const Derived, Dynamic, Dynamic, true >	ConstInnerVectorsReturnType

typedef Block< Derived, IsRowMajor?1:Dynamic, IsRowMajor?Dynamic:1, true >	InnerVectorReturnType

typedef Block< Derived, Dynamic, Dynamic, true >	InnerVectorsReturnType

typedef Block< Derived, Dynamic, internal::traits< Derived >::ColsAtCompileTime, IsRowMajor >	RowsBlockXpr

typedef Block< Derived, 1, internal::traits< Derived >::ColsAtCompileTime, IsRowMajor >	RowXpr

typedef VectorBlock< Derived >	SegmentReturnType

Functions
template<int NRows, int NCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< NRows, NCols >::Type	block (Index startRow, Index startCol)

template<int NRows, int NCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< NRows, NCols >::Type	block (Index startRow, Index startCol) const
	This is the const version of block<>(Index, Index). *‍/. More...

template<int NRows, int NCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< NRows, NCols >::Type	block (Index startRow, Index startCol, Index blockRows, Index blockCols)

template<int NRows, int NCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< NRows, NCols >::Type	block (Index startRow, Index startCol, Index blockRows, Index blockCols) const
	This is the const version of block<>(Index, Index, Index, Index). More...

template<typename NRowsType , typename NColsType >
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	block (Index startRow, Index startCol, NRowsType blockRows, NColsType blockCols)

template<typename NRowsType , typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	block (Index startRow, Index startCol, NRowsType blockRows, NColsType blockCols) const
	This is the const version of block(Index,Index,NRowsType,NColsType) More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	bottomLeftCorner ()

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	bottomLeftCorner () const
	This is the const version of bottomLeftCorner<int, int>(). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	bottomLeftCorner (Index cRows, Index cCols)

template<int CRows, int CCols>
const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	bottomLeftCorner (Index cRows, Index cCols) const
	This is the const version of bottomLeftCorner<int, int>(Index, Index). More...

template<typename NRowsType , typename NColsType >
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	bottomLeftCorner (NRowsType cRows, NColsType cCols)

template<typename NRowsType , typename NColsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	bottomLeftCorner (NRowsType cRows, NColsType cCols) const
	This is the const version of bottomLeftCorner(NRowsType, NColsType). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	bottomRightCorner ()

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	bottomRightCorner () const
	This is the const version of bottomRightCorner<int, int>(). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	bottomRightCorner (Index cRows, Index cCols)

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	bottomRightCorner (Index cRows, Index cCols) const
	This is the const version of bottomRightCorner<int, int>(Index, Index). More...

template<typename NRowsType , typename NColsType >
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	bottomRightCorner (NRowsType cRows, NColsType cCols)

template<typename NRowsType , typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	bottomRightCorner (NRowsType cRows, NColsType cCols) const
	This is the const version of bottomRightCorner(NRowsType, NColsType). More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr< N >::Type	bottomRows (Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNRowsBlockXpr< N >::Type	bottomRows (Index n=N) const
	This is the const version of bottomRows<int>(). More...

template<typename NRowsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr< internal::get_fixed_value< NRowsType >::value >::Type	bottomRows (NRowsType n)

template<typename NRowsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNRowsBlockXpr< internal::get_fixed_value< NRowsType >::value >::Type	bottomRows (NRowsType n) const
	This is the const version of bottomRows(NRowsType). More...

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ColXpr	col (Index i) const
	This is the const version of col(). More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType< N >::Type	head (Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedSegmentReturnType< N >::Type	head (Index n=N) const
	This is the const version of head<int>(). More...

template<typename NType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType< internal::get_fixed_value< NType >::value >::Type	head (NType n)

template<typename NType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedSegmentReturnType< internal::get_fixed_value< NType >::value >::Type	head (NType n) const
	This is the const version of head(NType). More...

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE InnerVectorReturnType	innerVector (Index outer)

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE InnerVectorsReturnType	innerVectors (Index outerStart, Index outerSize)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr< N >::Type	leftCols (Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNColsBlockXpr< N >::Type	leftCols (Index n=N) const
	This is the const version of leftCols<int>(). More...

template<typename NColsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr< internal::get_fixed_value< NColsType >::value >::Type	leftCols (NColsType n)

template<typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNColsBlockXpr< internal::get_fixed_value< NColsType >::value >::Type	leftCols (NColsType n) const
	This is the const version of leftCols(NColsType). More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr< N >::Type	middleCols (Index startCol, Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNColsBlockXpr< N >::Type	middleCols (Index startCol, Index n=N) const
	This is the const version of middleCols<int>(). More...

template<typename NColsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr< internal::get_fixed_value< NColsType >::value >::Type	middleCols (Index startCol, NColsType numCols)

template<typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNColsBlockXpr< internal::get_fixed_value< NColsType >::value >::Type	middleCols (Index startCol, NColsType numCols) const
	This is the const version of middleCols(Index,NColsType). More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr< N >::Type	middleRows (Index startRow, Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNRowsBlockXpr< N >::Type	middleRows (Index startRow, Index n=N) const
	This is the const version of middleRows<int>(). More...

template<typename NRowsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr< internal::get_fixed_value< NRowsType >::value >::Type	middleRows (Index startRow, NRowsType n)

template<typename NRowsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNRowsBlockXpr< internal::get_fixed_value< NRowsType >::value >::Type	middleRows (Index startRow, NRowsType n) const
	This is the const version of middleRows(Index,NRowsType). More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr< N >::Type	rightCols (Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNColsBlockXpr< N >::Type	rightCols (Index n=N) const
	This is the const version of rightCols<int>(). More...

template<typename NColsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr< internal::get_fixed_value< NColsType >::value >::Type	rightCols (NColsType n)

template<typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNColsBlockXpr< internal::get_fixed_value< NColsType >::value >::Type	rightCols (NColsType n) const
	This is the const version of rightCols(NColsType). More...

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE RowXpr	row (Index i) const
	This is the const version of row(). *‍/. More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType< N >::Type	segment (Index start, Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedSegmentReturnType< N >::Type	segment (Index start, Index n=N) const
	This is the const version of segment<int>(Index). More...

template<typename NType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType< internal::get_fixed_value< NType >::value >::Type	segment (Index start, NType n)

template<typename NType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedSegmentReturnType< internal::get_fixed_value< NType >::value >::Type	segment (Index start, NType n) const
	This is the const version of segment(Index,NType). More...

template<DirectionType Direction>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE internal::conditional< Direction==Vertical, ColXpr, RowXpr >::type	subVector (Index i)

template<DirectionType Direction>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE internal::conditional< Direction==Vertical, ConstColXpr, ConstRowXpr >::type	subVector (Index i) const

template<DirectionType Direction>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE EIGEN_CONSTEXPR Index	subVectors () const

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType< N >::Type	tail (Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedSegmentReturnType< N >::Type	tail (Index n=N) const
	This is the const version of tail<int>. More...

template<typename NType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType< internal::get_fixed_value< NType >::value >::Type	tail (NType n)

template<typename NType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedSegmentReturnType< internal::get_fixed_value< NType >::value >::Type	tail (NType n) const
	This is the const version of tail(Index). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	topLeftCorner ()

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	topLeftCorner () const
	This is the const version of topLeftCorner<int, int>(). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	topLeftCorner (Index cRows, Index cCols)

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	topLeftCorner (Index cRows, Index cCols) const
	This is the const version of topLeftCorner<int, int>(Index, Index). More...

template<typename NRowsType , typename NColsType >
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	topLeftCorner (NRowsType cRows, NColsType cCols)

template<typename NRowsType , typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	topLeftCorner (NRowsType cRows, NColsType cCols) const
	This is the const version of topLeftCorner(Index, Index). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	topRightCorner ()

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	topRightCorner () const
	This is the const version of topRightCorner<int, int>(). More...

template<int CRows, int CCols>
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< CRows, CCols >::Type	topRightCorner (Index cRows, Index cCols)

template<int CRows, int CCols>
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< CRows, CCols >::Type	topRightCorner (Index cRows, Index cCols) const
	This is the const version of topRightCorner<int, int>(Index, Index). More...

template<typename NRowsType , typename NColsType >
EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	topRightCorner (NRowsType cRows, NColsType cCols)

template<typename NRowsType , typename NColsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr< internal::get_fixed_value< NRowsType >::value, internal::get_fixed_value< NColsType >::value >::Type	topRightCorner (NRowsType cRows, NColsType cCols) const
	This is the const version of topRightCorner(NRowsType, NColsType). More...

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr< N >::Type	topRows (Index n=N)

template<int N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNRowsBlockXpr< N >::Type	topRows (Index n=N) const
	This is the const version of topRows<int>(). More...

template<typename NRowsType >
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr< internal::get_fixed_value< NRowsType >::value >::Type	topRows (NRowsType n)

template<typename NRowsType >
EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNRowsBlockXpr< internal::get_fixed_value< NRowsType >::value >::Type	topRows (NRowsType n) const
	This is the const version of topRows(NRowsType). More...

Variables
const typedef Block< const Derived >	ConstBlockXpr

const typedef Block< const Derived, internal::traits< Derived >::RowsAtCompileTime, Dynamic, !IsRowMajor >	ConstColsBlockXpr

const typedef Block< const Derived, internal::traits< Derived >::RowsAtCompileTime, 1, !IsRowMajor >	ConstColXpr

const typedef Block< const Derived, Dynamic, internal::traits< Derived >::ColsAtCompileTime, IsRowMajor >	ConstRowsBlockXpr

const typedef Block< const Derived, 1, internal::traits< Derived >::ColsAtCompileTime, IsRowMajor >	ConstRowXpr

const typedef VectorBlock< const Derived >	ConstSegmentReturnType

Typedef Documentation

◆ BlockXpr

typedef Block<Derived> BlockXpr

Definition at line 32 of file BlockMethods.h.

◆ ColsBlockXpr

typedef Block<Derived, internal::traits<Derived>::RowsAtCompileTime, Dynamic, !IsRowMajor> ColsBlockXpr

Definition at line 20 of file BlockMethods.h.

◆ ColXpr

typedef Block<Derived, internal::traits<Derived>::RowsAtCompileTime, 1, !IsRowMajor> ColXpr

Definition at line 14 of file BlockMethods.h.

◆ ConstInnerVectorReturnType

typedef Block<const Derived,IsRowMajor?1:Dynamic,IsRowMajor?Dynamic:1,true> ConstInnerVectorReturnType

Definition at line 45 of file BlockMethods.h.

◆ ConstInnerVectorsReturnType

typedef Block<const Derived,Dynamic,Dynamic,true> ConstInnerVectorsReturnType

Definition at line 49 of file BlockMethods.h.

◆ InnerVectorReturnType

typedef Block<Derived,IsRowMajor?1:Dynamic,IsRowMajor?Dynamic:1,true> InnerVectorReturnType

Definition at line 44 of file BlockMethods.h.

◆ InnerVectorsReturnType

typedef Block<Derived,Dynamic,Dynamic,true> InnerVectorsReturnType

Definition at line 48 of file BlockMethods.h.

◆ RowsBlockXpr

typedef Block<Derived, Dynamic, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> RowsBlockXpr

Definition at line 23 of file BlockMethods.h.

◆ RowXpr

typedef Block<Derived, 1, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> RowXpr

Definition at line 17 of file BlockMethods.h.

◆ SegmentReturnType

typedef VectorBlock<Derived> SegmentReturnType

Definition at line 38 of file BlockMethods.h.

Function Documentation

◆ block() [1/6]

template<int NRows, int NCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<NRows,NCols>::Type block	(	Index	startRow,
		Index	startCol
	)

Returns: a fixed-size expression of a block of *this.

The template parameters NRows and NCols are the number of rows and columns in the block.

Parameters

startRow	the first row in the block
startCol	the first column in the block

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.block<2,2>(1,1):" << endl << m.block<2,2>(1,1) << endl;
m.block<2,2>(1,1).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

Note: The usage of of this overload is discouraged from Eigen 3.4, better used the generic block(Index,Index,NRowsType,NColsType), here is the one-to-one equivalence:
mat.template block<NRows,NCols>(i,j) <--> mat.block(i,j,fix<NRows>,fix<NCols>); since block is a templated member, the keyword template has to be used if the matrix type is also a template parameter:
m.template block<3,3>(1,1);

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 1027 of file BlockMethods.h.

◆ block() [2/6]

template<int NRows, int NCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<NRows,NCols>::Type block	(	Index	startRow,
		Index	startCol
	)		const

This is the const version of block<>(Index, Index). *‍/.

Definition at line 1035 of file BlockMethods.h.

◆ block() [3/6]

template<int NRows, int NCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<NRows,NCols>::Type block	(	Index	startRow,
		Index	startCol,
		Index	blockRows,
		Index	blockCols
	)

Returns: an expression of a block of *this.

Template Parameters

NRows	number of rows in block as specified at compile-time
NCols	number of columns in block as specified at compile-time

Parameters

startRow	the first row in the block
startCol	the first column in the block
blockRows	number of rows in block as specified at run-time
blockCols	number of columns in block as specified at run-time

This function is mainly useful for blocks where the number of rows is specified at compile-time and the number of columns is specified at run-time, or vice versa. The compile-time and run-time information should not contradict. In other words, blockRows should equal NRows unless NRows is Dynamic, and the same for the number of columns.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is the block:" << endl << m.block<2, Dynamic>(1, 1, 2, 3) << endl;
m.block<2, Dynamic>(1, 1, 2, 3).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

Note: The usage of of this overload is discouraged from Eigen 3.4, better used the generic block(Index,Index,NRowsType,NColsType), here is the one-to-one complete equivalence:
mat.template block<NRows,NCols>(i,j,rows,cols) <--> mat.block(i,j,fix<NRows>(rows),fix<NCols>(cols))

If we known that, e.g., NRows==Dynamic and NCols!=Dynamic, then the equivalence becomes:
mat.template block<Dynamic,NCols>(i,j,rows,NCols) <--> mat.block(i,j,rows,fix<NCols>)

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 1073 of file BlockMethods.h.

◆ block() [4/6]

template<int NRows, int NCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<NRows,NCols>::Type block	(	Index	startRow,
		Index	startCol,
		Index	blockRows,
		Index	blockCols
	)		const

This is the const version of block<>(Index, Index, Index, Index).

Definition at line 1082 of file BlockMethods.h.

◆ block() [5/6]

template<typename NRowsType , typename NColsType >

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type block	(	Index	startRow,
		Index	startCol,
		NRowsType	blockRows,
		NColsType	blockCols
	)

Returns: an expression of a block in *this with either dynamic or fixed sizes.

Parameters

startRow	the first row in the block
startCol	the first column in the block
blockRows	number of rows in the block, specified at either run-time or compile-time
blockCols	number of columns in the block, specified at either run-time or compile-time

Template Parameters

NRowsType	the type of the value handling the number of rows in the block, typically Index.
NColsType	the type of the value handling the number of columns in the block, typically Index.

Example using runtime (aka dynamic) sizes:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.block(1, 1, 2, 2):" << endl << m.block(1, 1, 2, 2) << endl;
m.block(1, 1, 2, 2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

\newin{3.4}:

The number of rows blockRows and columns blockCols can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. In the later case, n plays the role of a runtime fallback value in case N equals Eigen::Dynamic. Here is an example with a fixed number of rows NRows and dynamic number of columns cols:

mat.block(i,j,fix<NRows>,cols)

This function thus fully covers the features offered by the following overloads block<NRows,NCols>(Index, Index), and block<NRows,NCols>(Index, Index, Index, Index) that are thus obsolete. Indeed, this generic version avoids redundancy, it preserves the argument order, and prevents the need to rely on the template keyword in templated code.

but with less redundancy and more consistency as it does not modify the argument order and seamlessly enable hybrid fixed/dynamic sizes.

Note: Even in the case that the returned expression has dynamic size, in the case when it is applied to a fixed-size matrix, it inherits a fixed maximal size, which means that evaluating it does not cause a dynamic memory allocation.

See also: class Block, fix, fix<N>(int)

Definition at line 96 of file BlockMethods.h.

◆ block() [6/6]

template<typename NRowsType , typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type block	(	Index	startRow,
		Index	startCol,
		NRowsType	blockRows,
		NColsType	blockCols
	)		const

This is the const version of block(Index,Index,NRowsType,NColsType)

Definition at line 110 of file BlockMethods.h.

◆ bottomLeftCorner() [1/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type bottomLeftCorner ( )

Returns: an expression of a fixed-size bottom-left corner of *this.

The template parameters CRows and CCols are the number of rows and columns in the corner.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.bottomLeftCorner<2,2>():" << endl;
cout << m.bottomLeftCorner<2,2>() << endl;
m.bottomLeftCorner<2,2>().setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 498 of file BlockMethods.h.

◆ bottomLeftCorner() [2/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type bottomLeftCorner ( ) const

This is the const version of bottomLeftCorner<int, int>().

Definition at line 506 of file BlockMethods.h.

◆ bottomLeftCorner() [3/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type bottomLeftCorner	(	Index	cRows,
		Index	cCols
	)

Returns: an expression of a bottom-left corner of *this.

Template Parameters

CRows	number of rows in corner as specified at compile-time
CCols	number of columns in corner as specified at compile-time

Parameters

cRows	number of rows in corner as specified at run-time
cCols	number of columns in corner as specified at run-time

This function is mainly useful for corners where the number of rows is specified at compile-time and the number of columns is specified at run-time, or vice versa. The compile-time and run-time information should not contradict. In other words, cRows should equal CRows unless CRows is Dynamic, and the same for the number of columns.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.bottomLeftCorner<2,Dynamic>(2,2):" << endl;
cout << m.bottomLeftCorner<2,Dynamic>(2,2) << endl;
m.bottomLeftCorner<2,Dynamic>(2,2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: class Block

Definition at line 532 of file BlockMethods.h.

◆ bottomLeftCorner() [4/6]

template<int CRows, int CCols>

const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type bottomLeftCorner	(	Index	cRows,
		Index	cCols
	)		const

This is the const version of bottomLeftCorner<int, int>(Index, Index).

Definition at line 540 of file BlockMethods.h.

◆ bottomLeftCorner() [5/6]

template<typename NRowsType , typename NColsType >

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type bottomLeftCorner	(	NRowsType	cRows,
		NColsType	cCols
	)

Returns: an expression of a bottom-left corner of *this with either dynamic or fixed sizes.

Parameters

cRows	the number of rows in the corner
cCols	the number of columns in the corner

Template Parameters

NRowsType	the type of the value handling the number of rows in the block, typically Index.
NColsType	the type of the value handling the number of columns in the block, typically Index.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.bottomLeftCorner(2, 2):" << endl;
cout << m.bottomLeftCorner(2, 2) << endl;
m.bottomLeftCorner(2, 2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

The number of rows blockRows and columns blockCols can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 463 of file BlockMethods.h.

◆ bottomLeftCorner() [6/6]

template<typename NRowsType , typename NColsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type bottomLeftCorner	(	NRowsType	cRows,
		NColsType	cCols
	)		const

This is the const version of bottomLeftCorner(NRowsType, NColsType).

Definition at line 478 of file BlockMethods.h.

◆ bottomRightCorner() [1/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type bottomRightCorner ( )

Returns: an expression of a fixed-size bottom-right corner of *this.

The template parameters CRows and CCols are the number of rows and columns in the corner.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.bottomRightCorner<2,2>():" << endl;
cout << m.bottomRightCorner<2,2>() << endl;
m.bottomRightCorner<2,2>().setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 390 of file BlockMethods.h.

◆ bottomRightCorner() [2/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type bottomRightCorner ( ) const

This is the const version of bottomRightCorner<int, int>().

Definition at line 398 of file BlockMethods.h.

◆ bottomRightCorner() [3/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type bottomRightCorner	(	Index	cRows,
		Index	cCols
	)

Returns: an expression of a bottom-right corner of *this.

Template Parameters

CRows	number of rows in corner as specified at compile-time
CCols	number of columns in corner as specified at compile-time

Parameters

cRows	number of rows in corner as specified at run-time
cCols	number of columns in corner as specified at run-time

This function is mainly useful for corners where the number of rows is specified at compile-time and the number of columns is specified at run-time, or vice versa. The compile-time and run-time information should not contradict. In other words, cRows should equal CRows unless CRows is Dynamic, and the same for the number of columns.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.bottomRightCorner<2,Dynamic>(2,2):" << endl;
cout << m.bottomRightCorner<2,Dynamic>(2,2) << endl;
m.bottomRightCorner<2,Dynamic>(2,2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: class Block

Definition at line 424 of file BlockMethods.h.

◆ bottomRightCorner() [4/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type bottomRightCorner	(	Index	cRows,
		Index	cCols
	)		const

This is the const version of bottomRightCorner<int, int>(Index, Index).

Definition at line 432 of file BlockMethods.h.

◆ bottomRightCorner() [5/6]

template<typename NRowsType , typename NColsType >

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type bottomRightCorner	(	NRowsType	cRows,
		NColsType	cCols
	)

Returns: an expression of a bottom-right corner of *this with either dynamic or fixed sizes.

Parameters

cRows	the number of rows in the corner
cCols	the number of columns in the corner

Template Parameters

NRowsType	the type of the value handling the number of rows in the block, typically Index.
NColsType	the type of the value handling the number of columns in the block, typically Index.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.bottomRightCorner(2, 2):" << endl;
cout << m.bottomRightCorner(2, 2) << endl;
m.bottomRightCorner(2, 2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

The number of rows blockRows and columns blockCols can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 355 of file BlockMethods.h.

◆ bottomRightCorner() [6/6]

template<typename NRowsType , typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type bottomRightCorner	(	NRowsType	cRows,
		NColsType	cCols
	)		const

This is the const version of bottomRightCorner(NRowsType, NColsType).

Definition at line 370 of file BlockMethods.h.

◆ bottomRows() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr<N>::Type bottomRows ( Index n = N )

Returns: a block consisting of the bottom rows of *this.

Template Parameters

N	the number of rows in the block as specified at compile-time

Parameters

n	the number of rows in the block as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.bottomRows<2>():" << endl;
cout << a.bottomRows<2>() << endl;
a.bottomRows<2>().setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 682 of file BlockMethods.h.

◆ bottomRows() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNRowsBlockXpr<N>::Type bottomRows ( Index n = N ) const

This is the const version of bottomRows<int>().

Definition at line 690 of file BlockMethods.h.

◆ bottomRows() [3/4]

template<typename NRowsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type bottomRows ( NRowsType n )

Returns: a block consisting of the bottom rows of *this.

Parameters

n	the number of rows in the block

Template Parameters

NRowsType the type of the value handling the number of rows in the block, typically Index.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.bottomRows(2):" << endl;
cout << a.bottomRows(2) << endl;
a.bottomRows(2).setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

The number of rows n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 645 of file BlockMethods.h.

◆ bottomRows() [4/4]

template<typename NRowsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type bottomRows ( NRowsType n ) const

This is the const version of bottomRows(NRowsType).

Definition at line 659 of file BlockMethods.h.

◆ col()

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstColXpr col ( Index i )

This is the const version of col().

Returns: an expression of the i-th column of *this. Note that the numbering starts at 0.

Example:

Matrix3d m = Matrix3d::Identity();
m.col(1) = Vector3d(4,5,6);
cout << m << endl;

Output:

See also: row(), class Block

Definition at line 1097 of file BlockMethods.h.

◆ head() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType<N>::Type head ( Index n = N )

Returns: a fixed-size expression of the first coefficients of *this.

\only_for_vectors

Template Parameters

N	the number of coefficients in the segment as specified at compile-time

Parameters

n	the number of coefficients in the segment as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

RowVector4i v = RowVector4i::Random();
cout << "Here is the vector v:" << endl << v << endl;
cout << "Here is v.head(2):" << endl << v.head<2>() << endl;
v.head<2>().setZero();
cout << "Now the vector v is:" << endl << v << endl;

Output:

See also: head(NType), class Block

Definition at line 1329 of file BlockMethods.h.

◆ head() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedSegmentReturnType<N>::Type head ( Index n = N ) const

This is the const version of head<int>().

Definition at line 1338 of file BlockMethods.h.

◆ head() [3/4]

template<typename NType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type head ( NType n )

Returns: an expression of the first coefficients of *this with either dynamic or fixed sizes.

\only_for_vectors

Parameters

n	the number of coefficients in the segment

Template Parameters

NType the type of the value handling the number of coefficients in the segment, typically Index.

Example:

RowVector4i v = RowVector4i::Random();
cout << "Here is the vector v:" << endl << v << endl;
cout << "Here is v.head(2):" << endl << v.head(2) << endl;
v.head(2).setZero();
cout << "Now the vector v is:" << endl << v << endl;

Output:

The number of coefficients n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

Note: Even in the case that the returned expression has dynamic size, in the case when it is applied to a fixed-size vector, it inherits a fixed maximal size, which means that evaluating it does not cause a dynamic memory allocation.

See also: class Block, block(Index,Index)

Definition at line 1208 of file BlockMethods.h.

◆ head() [4/4]

template<typename NType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type head ( NType n ) const

This is the const version of head(NType).

Definition at line 1223 of file BlockMethods.h.

◆ innerVector()

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstInnerVectorReturnType innerVector ( Index outer )

Returns: the outer -th column (resp. row) of the matrix *this if *this is col-major (resp. row-major).; the outer -th column (resp. row) of the matrix *this if *this is col-major (resp. row-major). Read-only.

Definition at line 1380 of file BlockMethods.h.

◆ innerVectors()

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstInnerVectorsReturnType innerVectors	(	Index	outerStart,
		Index	outerSize
	)

Returns: the outer -th column (resp. row) of the matrix *this if *this is col-major (resp. row-major).; the outer -th column (resp. row) of the matrix *this if *this is col-major (resp. row-major). Read-only.

Definition at line 1395 of file BlockMethods.h.

◆ leftCols() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr<N>::Type leftCols ( Index n = N )

Returns: a block consisting of the left columns of *this.

Template Parameters

N	the number of columns in the block as specified at compile-time

Parameters

n	the number of columns in the block as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.leftCols<2>():" << endl;
cout << a.leftCols<2>() << endl;
a.leftCols<2>().setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 834 of file BlockMethods.h.

◆ leftCols() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNColsBlockXpr<N>::Type leftCols ( Index n = N ) const

This is the const version of leftCols<int>().

Definition at line 842 of file BlockMethods.h.

◆ leftCols() [3/4]

template<typename NColsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type leftCols ( NColsType n )

Returns: a block consisting of the left columns of *this.

Parameters

n	the number of columns in the block

Template Parameters

NColsType the type of the value handling the number of columns in the block, typically Index.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.leftCols(2):" << endl;
cout << a.leftCols(2) << endl;
a.leftCols(2).setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

The number of columns n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 797 of file BlockMethods.h.

◆ leftCols() [4/4]

template<typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type leftCols ( NColsType n ) const

This is the const version of leftCols(NColsType).

Definition at line 811 of file BlockMethods.h.

◆ middleCols() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr<N>::Type middleCols	(	Index	startCol,
		Index	n = `N`
	)

Returns: a block consisting of a range of columns of *this.

Template Parameters

N	the number of columns in the block as specified at compile-time

Parameters

startCol	the index of the first column in the block
n	the number of columns in the block as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

#include <Eigen/Core>
#include <iostream>
 
using namespace Eigen;
using namespace std;
 
int main(void)
{
    int const N = 5;
    MatrixXi A(N,N);
    A.setRandom();
    cout << "A =\n" << A << '\n' << endl;
    cout << "A(:,1..3) =\n" << A.middleCols<3>(1) << endl;
    return 0;
}

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 986 of file BlockMethods.h.

◆ middleCols() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNColsBlockXpr<N>::Type middleCols	(	Index	startCol,
		Index	n = `N`
	)		const

This is the const version of middleCols<int>().

Definition at line 994 of file BlockMethods.h.

◆ middleCols() [3/4]

template<typename NColsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type middleCols	(	Index	startCol,
		NColsType	numCols
	)

Returns: a block consisting of a range of columns of *this.

Parameters

startCol	the index of the first column in the block
numCols	the number of columns in the block

Template Parameters

NColsType the type of the value handling the number of columns in the block, typically Index.

Example:

#include <Eigen/Core>
#include <iostream>
 
using namespace Eigen;
using namespace std;
 
int main(void)
{
    int const N = 5;
    MatrixXi A(N,N);
    A.setRandom();
    cout << "A =\n" << A << '\n' << endl;
    cout << "A(1..3,:) =\n" << A.middleCols(1,3) << endl;
    return 0;
}

Output:

The number of columns n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 948 of file BlockMethods.h.

◆ middleCols() [4/4]

template<typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type middleCols	(	Index	startCol,
		NColsType	numCols
	)		const

This is the const version of middleCols(Index,NColsType).

Definition at line 962 of file BlockMethods.h.

◆ middleRows() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr<N>::Type middleRows	(	Index	startRow,
		Index	n = `N`
	)

Returns: a block consisting of a range of rows of *this.

Template Parameters

N	the number of rows in the block as specified at compile-time

Parameters

startRow	the index of the first row in the block
n	the number of rows in the block as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

#include <Eigen/Core>
#include <iostream>
 
using namespace Eigen;
using namespace std;
 
int main(void)
{
    int const N = 5;
    MatrixXi A(N,N);
    A.setRandom();
    cout << "A =\n" << A << '\n' << endl;
    cout << "A(1..3,:) =\n" << A.middleRows<3>(1) << endl;
    return 0;
}

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 759 of file BlockMethods.h.

◆ middleRows() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNRowsBlockXpr<N>::Type middleRows	(	Index	startRow,
		Index	n = `N`
	)		const

This is the const version of middleRows<int>().

Definition at line 767 of file BlockMethods.h.

◆ middleRows() [3/4]

template<typename NRowsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type middleRows	(	Index	startRow,
		NRowsType	n
	)

Returns: a block consisting of a range of rows of *this.

Parameters

startRow	the index of the first row in the block
n	the number of rows in the block

Template Parameters

NRowsType the type of the value handling the number of rows in the block, typically Index.

Example:

#include <Eigen/Core>
#include <iostream>
 
using namespace Eigen;
using namespace std;
 
int main(void)
{
    int const N = 5;
    MatrixXi A(N,N);
    A.setRandom();
    cout << "A =\n" << A << '\n' << endl;
    cout << "A(2..3,:) =\n" << A.middleRows(2,2) << endl;
    return 0;
}

Output:

The number of rows n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 721 of file BlockMethods.h.

◆ middleRows() [4/4]

template<typename NRowsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type middleRows	(	Index	startRow,
		NRowsType	n
	)		const

This is the const version of middleRows(Index,NRowsType).

Definition at line 735 of file BlockMethods.h.

◆ rightCols() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr<N>::Type rightCols ( Index n = N )

Returns: a block consisting of the right columns of *this.

Template Parameters

N	the number of columns in the block as specified at compile-time

Parameters

n	the number of columns in the block as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.rightCols<2>():" << endl;
cout << a.rightCols<2>() << endl;
a.rightCols<2>().setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 909 of file BlockMethods.h.

◆ rightCols() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNColsBlockXpr<N>::Type rightCols ( Index n = N ) const

This is the const version of rightCols<int>().

Definition at line 917 of file BlockMethods.h.

◆ rightCols() [3/4]

template<typename NColsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type rightCols ( NColsType n )

Returns: a block consisting of the right columns of *this.

Parameters

n	the number of columns in the block

Template Parameters

NColsType the type of the value handling the number of columns in the block, typically Index.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.rightCols(2):" << endl;
cout << a.rightCols(2) << endl;
a.rightCols(2).setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

The number of columns n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 872 of file BlockMethods.h.

◆ rightCols() [4/4]

template<typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type rightCols ( NColsType n ) const

This is the const version of rightCols(NColsType).

Definition at line 886 of file BlockMethods.h.

◆ row()

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstRowXpr row ( Index i )

This is the const version of row(). *‍/.

Returns: an expression of the i-th row of *this. Note that the numbering starts at 0.

Example:

Matrix3d m = Matrix3d::Identity();
m.row(1) = Vector3d(4,5,6);
cout << m << endl;

Output:

See also: col(), class Block

Definition at line 1118 of file BlockMethods.h.

◆ segment() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType<N>::Type segment	(	Index	start,
		Index	n = `N`
	)

Returns: a fixed-size expression of a segment (i.e. a vector block) in *this

\only_for_vectors

Template Parameters

N	the number of coefficients in the segment as specified at compile-time

Parameters

start	the index of the first element in the segment
n	the number of coefficients in the segment as specified at compile-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

RowVector4i v = RowVector4i::Random();
cout << "Here is the vector v:" << endl << v << endl;
cout << "Here is v.segment<2>(1):" << endl << v.segment<2>(1) << endl;
v.segment<2>(2).setZero();
cout << "Now the vector v is:" << endl << v << endl;

Output:

See also: segment(Index,NType), class Block

Definition at line 1297 of file BlockMethods.h.

◆ segment() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedSegmentReturnType<N>::Type segment	(	Index	start,
		Index	n = `N`
	)		const

This is the const version of segment<int>(Index).

Definition at line 1306 of file BlockMethods.h.

◆ segment() [3/4]

template<typename NType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type segment	(	Index	start,
		NType	n
	)

Returns: an expression of a segment (i.e. a vector block) in *this with either dynamic or fixed sizes.

\only_for_vectors

Parameters

start	the first coefficient in the segment
n	the number of coefficients in the segment

Template Parameters

NType the type of the value handling the number of coefficients in the segment, typically Index.

Example:

RowVector4i v = RowVector4i::Random();
cout << "Here is the vector v:" << endl << v << endl;
cout << "Here is v.segment(1, 2):" << endl << v.segment(1, 2) << endl;
v.segment(1, 2).setZero();
cout << "Now the vector v is:" << endl << v << endl;

Output:

The number of coefficients n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

Note: Even in the case that the returned expression has dynamic size, in the case when it is applied to a fixed-size vector, it inherits a fixed maximal size, which means that evaluating it does not cause a dynamic memory allocation.

See also: block(Index,Index,NRowsType,NColsType), fix<N>, fix<N>(int), class Block

Definition at line 1158 of file BlockMethods.h.

◆ segment() [4/4]

template<typename NType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type segment	(	Index	start,
		NType	n
	)		const

This is the const version of segment(Index,NType).

Definition at line 1174 of file BlockMethods.h.

◆ subVector() [1/2]

template<DirectionType Direction>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE internal::conditional<Direction==Vertical,ColXpr,RowXpr>::type subVector ( Index i )

Returns: the i-th subvector (column or vector) according to the Direction

See also: subVectors()

Definition at line 1422 of file BlockMethods.h.

◆ subVector() [2/2]

template<DirectionType Direction>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE internal::conditional<Direction==Vertical,ConstColXpr,ConstRowXpr>::type subVector ( Index i ) const

This is the const version of subVector(Index)

Definition at line 1431 of file BlockMethods.h.

◆ subVectors()

template<DirectionType Direction>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE EIGEN_CONSTEXPR Index subVectors ( ) const

Returns: the number of subvectors (rows or columns) in the direction Direction

See also: subVector(Index)

Definition at line 1441 of file BlockMethods.h.

◆ tail() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType<N>::Type tail ( Index n = N )

Returns: a fixed-size expression of the last coefficients of *this.

\only_for_vectors

Template Parameters

N	the number of coefficients in the segment as specified at compile-time

Parameters

n	the number of coefficients in the segment as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

RowVector4i v = RowVector4i::Random();
cout << "Here is the vector v:" << endl << v << endl;
cout << "Here is v.tail(2):" << endl << v.tail<2>() << endl;
v.tail<2>().setZero();
cout << "Now the vector v is:" << endl << v << endl;

Output:

See also: tail(NType), class Block

Definition at line 1361 of file BlockMethods.h.

◆ tail() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstFixedSegmentReturnType<N>::Type tail ( Index n = N ) const

This is the const version of tail<int>.

Definition at line 1370 of file BlockMethods.h.

◆ tail() [3/4]

template<typename NType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type tail ( NType n )

Returns: an expression of a last coefficients of *this with either dynamic or fixed sizes.

\only_for_vectors

Parameters

n	the number of coefficients in the segment

Template Parameters

NType the type of the value handling the number of coefficients in the segment, typically Index.

Example:

RowVector4i v = RowVector4i::Random();
cout << "Here is the vector v:" << endl << v << endl;
cout << "Here is v.tail(2):" << endl << v.tail(2) << endl;
v.tail(2).setZero();
cout << "Now the vector v is:" << endl << v << endl;

Output:

The number of coefficients n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

Note: Even in the case that the returned expression has dynamic size, in the case when it is applied to a fixed-size vector, it inherits a fixed maximal size, which means that evaluating it does not cause a dynamic memory allocation.

See also: class Block, block(Index,Index)

Definition at line 1257 of file BlockMethods.h.

◆ tail() [4/4]

template<typename NType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type tail ( NType n ) const

This is the const version of tail(Index).

Definition at line 1272 of file BlockMethods.h.

◆ topLeftCorner() [1/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type topLeftCorner ( )

Returns: an expression of a fixed-size top-left corner of *this.

The template parameters CRows and CCols are the number of rows and columns in the corner.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.topLeftCorner<2,2>():" << endl;
cout << m.topLeftCorner<2,2>() << endl;
m.topLeftCorner<2,2>().setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 282 of file BlockMethods.h.

◆ topLeftCorner() [2/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type topLeftCorner ( ) const

This is the const version of topLeftCorner<int, int>().

Definition at line 290 of file BlockMethods.h.

◆ topLeftCorner() [3/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type topLeftCorner	(	Index	cRows,
		Index	cCols
	)

Returns: an expression of a top-left corner of *this.

Template Parameters

CRows	number of rows in corner as specified at compile-time
CCols	number of columns in corner as specified at compile-time

Parameters

cRows	number of rows in corner as specified at run-time
cCols	number of columns in corner as specified at run-time

This function is mainly useful for corners where the number of rows is specified at compile-time and the number of columns is specified at run-time, or vice versa. The compile-time and run-time information should not contradict. In other words, cRows should equal CRows unless CRows is Dynamic, and the same for the number of columns.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.topLeftCorner<2,Dynamic>(2,2):" << endl;
cout << m.topLeftCorner<2,Dynamic>(2,2) << endl;
m.topLeftCorner<2,Dynamic>(2,2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: class Block

Definition at line 316 of file BlockMethods.h.

◆ topLeftCorner() [4/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type topLeftCorner	(	Index	cRows,
		Index	cCols
	)		const

This is the const version of topLeftCorner<int, int>(Index, Index).

Definition at line 324 of file BlockMethods.h.

◆ topLeftCorner() [5/6]

template<typename NRowsType , typename NColsType >

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type topLeftCorner	(	NRowsType	cRows,
		NColsType	cCols
	)

Returns: an expression of a top-left corner of *this with either dynamic or fixed sizes.

Parameters

cRows	the number of rows in the corner
cCols	the number of columns in the corner

Template Parameters

NRowsType	the type of the value handling the number of rows in the block, typically Index.
NColsType	the type of the value handling the number of columns in the block, typically Index.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.topLeftCorner(2, 2):" << endl;
cout << m.topLeftCorner(2, 2) << endl;
m.topLeftCorner(2, 2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

The number of rows blockRows and columns blockCols can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 249 of file BlockMethods.h.

◆ topLeftCorner() [6/6]

template<typename NRowsType , typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type topLeftCorner	(	NRowsType	cRows,
		NColsType	cCols
	)		const

This is the const version of topLeftCorner(Index, Index).

Definition at line 263 of file BlockMethods.h.

◆ topRightCorner() [1/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type topRightCorner ( )

Returns: an expression of a fixed-size top-right corner of *this.

Template Parameters

CRows	the number of rows in the corner
CCols	the number of columns in the corner

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.topRightCorner<2,2>():" << endl;
cout << m.topRightCorner<2,2>() << endl;
m.topRightCorner<2,2>().setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: class Block, block<int,int>(Index,Index)

Definition at line 176 of file BlockMethods.h.

◆ topRightCorner() [2/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type topRightCorner ( ) const

This is the const version of topRightCorner<int, int>().

Definition at line 184 of file BlockMethods.h.

◆ topRightCorner() [3/6]

template<int CRows, int CCols>

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<CRows,CCols>::Type topRightCorner	(	Index	cRows,
		Index	cCols
	)

Returns: an expression of a top-right corner of *this.

Template Parameters

CRows	number of rows in corner as specified at compile-time
CCols	number of columns in corner as specified at compile-time

Parameters

cRows	number of rows in corner as specified at run-time
cCols	number of columns in corner as specified at run-time

This function is mainly useful for corners where the number of rows is specified at compile-time and the number of columns is specified at run-time, or vice versa. The compile-time and run-time information should not contradict. In other words, cRows should equal CRows unless CRows is Dynamic, and the same for the number of columns.

Example:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.topRightCorner<2,Dynamic>(2,2):" << endl;
cout << m.topRightCorner<2,Dynamic>(2,2) << endl;
m.topRightCorner<2,Dynamic>(2,2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

See also: class Block

Definition at line 210 of file BlockMethods.h.

◆ topRightCorner() [4/6]

template<int CRows, int CCols>

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<CRows,CCols>::Type topRightCorner	(	Index	cRows,
		Index	cCols
	)		const

This is the const version of topRightCorner<int, int>(Index, Index).

Definition at line 218 of file BlockMethods.h.

◆ topRightCorner() [5/6]

template<typename NRowsType , typename NColsType >

EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type topRightCorner	(	NRowsType	cRows,
		NColsType	cCols
	)

Returns: a expression of a top-right corner of *this with either dynamic or fixed sizes.

Parameters

cRows	the number of rows in the corner
cCols	the number of columns in the corner

Template Parameters

NRowsType	the type of the value handling the number of rows in the block, typically Index.
NColsType	the type of the value handling the number of columns in the block, typically Index.

Example with dynamic sizes:

Matrix4i m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.topRightCorner(2, 2):" << endl;
cout << m.topRightCorner(2, 2) << endl;
m.topRightCorner(2, 2).setZero();
cout << "Now the matrix m is:" << endl << m << endl;

Output:

The number of rows blockRows and columns blockCols can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 142 of file BlockMethods.h.

◆ topRightCorner() [6/6]

template<typename NRowsType , typename NColsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type topRightCorner	(	NRowsType	cRows,
		NColsType	cCols
	)		const

This is the const version of topRightCorner(NRowsType, NColsType).

Definition at line 156 of file BlockMethods.h.

◆ topRows() [1/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr<N>::Type topRows ( Index n = N )

Returns: a block consisting of the top rows of *this.

Template Parameters

N	the number of rows in the block as specified at compile-time

Parameters

n	the number of rows in the block as specified at run-time

The compile-time and run-time information should not contradict. In other words, n should equal N unless N is Dynamic.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.topRows<2>():" << endl;
cout << a.topRows<2>() << endl;
a.topRows<2>().setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 607 of file BlockMethods.h.

◆ topRows() [2/4]

template<int N>

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ConstNRowsBlockXpr<N>::Type topRows ( Index n = N ) const

This is the const version of topRows<int>().

Definition at line 615 of file BlockMethods.h.

◆ topRows() [3/4]

template<typename NRowsType >

EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE NRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type topRows ( NRowsType n )

Returns: a block consisting of the top rows of *this.

Parameters

n	the number of rows in the block

Template Parameters

NRowsType the type of the value handling the number of rows in the block, typically Index.

Example:

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.topRows(2):" << endl;
cout << a.topRows(2) << endl;
a.topRows(2).setZero();
cout << "Now the array a is:" << endl << a << endl;

Output:

The number of rows n can also be specified at compile-time by passing Eigen::fix<N>, or Eigen::fix<N>(n) as arguments. See block() for the details.

See also: block(Index,Index,NRowsType,NColsType), class Block

Definition at line 570 of file BlockMethods.h.

◆ topRows() [4/4]

template<typename NRowsType >

EIGEN_DEVICE_FUNC const EIGEN_STRONG_INLINE ConstNRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type topRows ( NRowsType n ) const

This is the const version of topRows(NRowsType).

Definition at line 584 of file BlockMethods.h.

Variable Documentation

◆ ConstBlockXpr

const typedef Block<const Derived> ConstBlockXpr

Definition at line 33 of file BlockMethods.h.

◆ ConstColsBlockXpr

const typedef Block<const Derived, internal::traits<Derived>::RowsAtCompileTime, Dynamic, !IsRowMajor> ConstColsBlockXpr

Definition at line 21 of file BlockMethods.h.

◆ ConstColXpr

const typedef Block<const Derived, internal::traits<Derived>::RowsAtCompileTime, 1, !IsRowMajor> ConstColXpr

Definition at line 15 of file BlockMethods.h.

◆ ConstRowsBlockXpr

const typedef Block<const Derived, Dynamic, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> ConstRowsBlockXpr

Definition at line 24 of file BlockMethods.h.

◆ ConstRowXpr

const typedef Block<const Derived, 1, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> ConstRowXpr

Definition at line 18 of file BlockMethods.h.

◆ ConstSegmentReturnType

const typedef VectorBlock<const Derived> ConstSegmentReturnType

Definition at line 39 of file BlockMethods.h.

Classes

Typedefs

Functions

Variables

Typedef Documentation

◆ BlockXpr

◆ ColsBlockXpr

◆ ColXpr

◆ ConstInnerVectorReturnType

◆ ConstInnerVectorsReturnType

◆ InnerVectorReturnType

◆ InnerVectorsReturnType

◆ RowsBlockXpr

◆ RowXpr

◆ SegmentReturnType

Function Documentation

◆ block() [1/6]

◆ block() [2/6]

◆ block() [3/6]

◆ block() [4/6]

◆ block() [5/6]

◆ block() [6/6]

◆ bottomLeftCorner() [1/6]

◆ bottomLeftCorner() [2/6]

◆ bottomLeftCorner() [3/6]

◆ bottomLeftCorner() [4/6]

◆ bottomLeftCorner() [5/6]

◆ bottomLeftCorner() [6/6]

◆ bottomRightCorner() [1/6]

◆ bottomRightCorner() [2/6]

◆ bottomRightCorner() [3/6]

◆ bottomRightCorner() [4/6]

◆ bottomRightCorner() [5/6]

◆ bottomRightCorner() [6/6]

◆ bottomRows() [1/4]

◆ bottomRows() [2/4]

◆ bottomRows() [3/4]

◆ bottomRows() [4/4]

◆ col()

◆ head() [1/4]

◆ head() [2/4]

◆ head() [3/4]

◆ head() [4/4]

◆ innerVector()

◆ innerVectors()

◆ leftCols() [1/4]

◆ leftCols() [2/4]

◆ leftCols() [3/4]

◆ leftCols() [4/4]

◆ middleCols() [1/4]

◆ middleCols() [2/4]

◆ middleCols() [3/4]

◆ middleCols() [4/4]

◆ middleRows() [1/4]

◆ middleRows() [2/4]

◆ middleRows() [3/4]

◆ middleRows() [4/4]

◆ rightCols() [1/4]

◆ rightCols() [2/4]

◆ rightCols() [3/4]

◆ rightCols() [4/4]

◆ row()

◆ segment() [1/4]

◆ segment() [2/4]

◆ segment() [3/4]

◆ segment() [4/4]

◆ subVector() [1/2]

◆ subVector() [2/2]

◆ subVectors()

◆ tail() [1/4]

◆ tail() [2/4]

◆ tail() [3/4]

◆ tail() [4/4]

◆ topLeftCorner() [1/6]

◆ topLeftCorner() [2/6]

◆ topLeftCorner() [3/6]

◆ topLeftCorner() [4/6]

◆ topLeftCorner() [5/6]

◆ topLeftCorner() [6/6]

◆ topRightCorner() [1/6]