Eigen::VectorBlock< VectorType, Size > Class Template Reference

Expression of a fixed-size or dynamic-size sub-vector. More...

#include <ForwardDeclarations.h>

Inheritance diagram for Eigen::VectorBlock< VectorType, Size >:

Public Member Functions
	VectorBlock (VectorType &vector, Index start, Index size)
	VectorBlock (VectorType &vector, Index start)
Public Member Functions inherited from Eigen::Block< VectorType, internal::traits< VectorType >::Flags &RowMajorBit?1:Size, internal::traits< VectorType >::Flags &RowMajorBit?Size:1 >
	Block (VectorType &xpr, Index i)
	Block (VectorType &xpr, Index a_startRow, Index a_startCol)
	Block (VectorType &xpr, Index a_startRow, Index a_startCol, Index blockRows, Index blockCols)

Private Types
enum	{ IsColVector = !(internal::traits<VectorType>::Flags & RowMajorBit) }
typedef Block< VectorType, internal::traits< VectorType >::Flags &RowMajorBit?1:Size, internal::traits< VectorType >::Flags &RowMajorBit?Size:1 >	Base

Additional Inherited Members
Public Types inherited from Eigen::Block< VectorType, internal::traits< VectorType >::Flags &RowMajorBit?1:Size, internal::traits< VectorType >::Flags &RowMajorBit?Size:1 >
typedef Impl	Base

Detailed Description

template<typename VectorType, int Size>
class Eigen::VectorBlock< VectorType, Size >

Expression of a fixed-size or dynamic-size sub-vector.

Parameters

VectorType	the type of the object in which we are taking a sub-vector
Size	size of the sub-vector we are taking at compile time (optional)

This class represents an expression of either a fixed-size or dynamic-size sub-vector. It is the return type of DenseBase::segment(Index,Index) and DenseBase::segment<int>(Index) and most of the time this is the only way it is used.

However, if you want to directly maniputate sub-vector expressions, for instance if you want to write a function returning such an expression, you will need to use this class.

Here is an example illustrating the dynamic case:

Output:

Note

Even though this expression has dynamic size, in the case where VectorType has fixed size, this expression inherits a fixed maximal size which means that evaluating it does not cause a dynamic memory allocation.

Here is an example illustrating the fixed-size case:

Output:

See also

class Block, DenseBase::segment(Index,Index,Index,Index), DenseBase::segment(Index,Index)

Definition at line 83 of file ForwardDeclarations.h.

Member Typedef Documentation

template<typename VectorType, int Size>

typedef Block<VectorType, internal::traits<VectorType>::Flags & RowMajorBit ? 1 : Size, internal::traits<VectorType>::Flags & RowMajorBit ? Size : 1> Eigen::VectorBlock< VectorType, Size >::Base

private

Definition at line 64 of file Core/VectorBlock.h.

Member Enumeration Documentation

template<typename VectorType, int Size>

anonymous enum

private

Enumerator
IsColVector

Definition at line 65 of file Core/VectorBlock.h.

Constructor & Destructor Documentation

template<typename VectorType, int Size>

Eigen::VectorBlock< VectorType, Size >::VectorBlock ( VectorType &  vector, Index  start, Index  size  )

inline

Dynamic-size constructor

Definition at line 75 of file Core/VectorBlock.h.

template<typename VectorType, int Size>

Eigen::VectorBlock< VectorType, Size >::VectorBlock ( VectorType &  vector, Index  start  )

inline

Fixed-size constructor

Definition at line 85 of file Core/VectorBlock.h.

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The documentation for this class was generated from the following files:

• ForwardDeclarations.h
• Core/VectorBlock.h