CommonCwiseUnaryOps.h File Reference

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Classes
struct	CastXpr< NewType >

Typedefs
typedef internal::conditional< NumTraits< Scalar >::IsComplex, const CwiseUnaryOp< internal::scalar_conjugate_op< Scalar >, const Derived >, const Derived & >::type	ConjugateReturnType
typedef CwiseUnaryOp< internal::scalar_imag_op< Scalar >, const Derived >	ImagReturnType
typedef CwiseUnaryOp< internal::scalar_opposite_op< Scalar >, const Derived >	NegativeReturnType
typedef CwiseUnaryView< internal::scalar_imag_ref_op< Scalar >, Derived >	NonConstImagReturnType
typedef internal::conditional< NumTraits< Scalar >::IsComplex, CwiseUnaryView< internal::scalar_real_ref_op< Scalar >, Derived >, Derived & >::type	NonConstRealReturnType
typedef internal::conditional< NumTraits< Scalar >::IsComplex, const CwiseUnaryOp< internal::scalar_real_op< Scalar >, const Derived >, const Derived & >::type	RealReturnType

Functions
template<typename NewType >
EIGEN_DEVICE_FUNC CastXpr< NewType >::Type	cast () const
EIGEN_DEVICE_FUNC ConjugateReturnType	conjugate () const
EIGEN_DEVICE_FUNC const ImagReturnType	imag ()
EIGEN_DEVICE_FUNC const NegativeReturnType	operator- () const
EIGEN_DEVICE_FUNC RealReturnType	real ()
template<typename CustomUnaryOp >
EIGEN_DEVICE_FUNC const CwiseUnaryOp< CustomUnaryOp, const Derived >	unaryExpr (const CustomUnaryOp &func=CustomUnaryOp()) const
	Apply a unary operator coefficient-wise. More...
template<typename CustomViewOp >
EIGEN_DEVICE_FUNC const CwiseUnaryView< CustomViewOp, const Derived >	unaryViewExpr (const CustomViewOp &func=CustomViewOp()) const

Typedef Documentation

typedef internal::conditional<NumTraits<Scalar>::IsComplex, const CwiseUnaryOp<internal::scalar_conjugate_op<Scalar>, const Derived>, const Derived& >::type ConjugateReturnType

Definition at line 19 of file CommonCwiseUnaryOps.h.

typedef CwiseUnaryOp<internal::scalar_imag_op<Scalar>, const Derived> ImagReturnType

Definition at line 31 of file CommonCwiseUnaryOps.h.

typedef CwiseUnaryOp<internal::scalar_opposite_op<Scalar>, const Derived> NegativeReturnType

Definition at line 35 of file CommonCwiseUnaryOps.h.

typedef CwiseUnaryView<internal::scalar_imag_ref_op<Scalar>, Derived> NonConstImagReturnType

Definition at line 33 of file CommonCwiseUnaryOps.h.

typedef internal::conditional<NumTraits<Scalar>::IsComplex, CwiseUnaryView<internal::scalar_real_ref_op<Scalar>, Derived>, Derived& >::type NonConstRealReturnType

Definition at line 29 of file CommonCwiseUnaryOps.h.

typedef internal::conditional<NumTraits<Scalar>::IsComplex, const CwiseUnaryOp<internal::scalar_real_op<Scalar>, const Derived>, const Derived& >::type RealReturnType

Definition at line 24 of file CommonCwiseUnaryOps.h.

Function Documentation

template<typename NewType >

EIGEN_DEVICE_FUNC CastXpr<NewType>::Type cast

(

)

const

Returns

an expression of *this with the Scalar type casted to NewScalar.

The template parameter NewScalar is the type we are casting the scalars to.

See also

class CwiseUnaryOp

Definition at line 62 of file CommonCwiseUnaryOps.h.

EIGEN_DEVICE_FUNC ConjugateReturnType conjugate ( ) const

inline

Returns

an expression of the complex conjugate of *this.

See also

Math functions, MatrixBase::adjoint()

Definition at line 74 of file CommonCwiseUnaryOps.h.

EIGEN_DEVICE_FUNC NonConstImagReturnType imag ( ) const

inline

Returns

an read-only expression of the imaginary part of *this.

See also

real()

Returns

a non const expression of the imaginary part of *this.

See also

real()

Definition at line 95 of file CommonCwiseUnaryOps.h.

EIGEN_DEVICE_FUNC const NegativeReturnType operator- ( ) const

inline

Returns

an expression of the opposite of *this

Definition at line 45 of file CommonCwiseUnaryOps.h.

EIGEN_DEVICE_FUNC RealReturnType real ( ) const

inline

Returns

a read-only expression of the real part of *this.

See also

imag()

Returns

a non const expression of the real part of *this.

See also

imag()

Definition at line 86 of file CommonCwiseUnaryOps.h.

template<typename CustomUnaryOp >

EIGEN_DEVICE_FUNC const CwiseUnaryOp<CustomUnaryOp, const Derived> unaryExpr ( const CustomUnaryOp &  func = CustomUnaryOp() ) const

inline

Apply a unary operator coefficient-wise.

Parameters

[in]

func

Functor implementing the unary operator

Template Parameters

CustomUnaryOp

Type of func

Returns

An expression of a custom coefficient-wise unary operator func of *this

The function ptr_fun() from the C++ standard library can be used to make functors out of normal functions.

Example:

#include <Eigen/Core>
#include <iostream>
using namespace Eigen;
using namespace std;

// define function to be applied coefficient-wise
double ramp(double x)
{
  if (x > 0)
    return x;
  else 
    return 0;
}

int main(int, char**)
{
  Matrix4d m1 = Matrix4d::Random();
  cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(ptr_fun(ramp)) << endl;
  return 0;
}

Output:

Genuine functors allow for more possibilities, for instance it may contain a state.

Example:

#include <Eigen/Core>
#include <iostream>
using namespace Eigen;
using namespace std;

// define a custom template unary functor
template<typename Scalar>
struct CwiseClampOp {
  CwiseClampOp(const Scalar& inf, const Scalar& sup) : m_inf(inf), m_sup(sup) {}
  const Scalar operator()(const Scalar& x) const { return x<m_inf ? m_inf : (x>m_sup ? m_sup : x); }
  Scalar m_inf, m_sup;
};

int main(int, char**)
{
  Matrix4d m1 = Matrix4d::Random();
  cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(CwiseClampOp<double>(-0.5,0.5)) << endl;
  return 0;
}

Output:

See also

unaryViewExpr, binaryExpr, class CwiseUnaryOp

Definition at line 121 of file CommonCwiseUnaryOps.h.

template<typename CustomViewOp >

EIGEN_DEVICE_FUNC const CwiseUnaryView<CustomViewOp, const Derived> unaryViewExpr ( const CustomViewOp &  func = CustomViewOp() ) const

inline

Returns

an expression of a custom coefficient-wise unary operator func of *this

The template parameter CustomUnaryOp is the type of the functor of the custom unary operator.

Example:

#include <Eigen/Core>
#include <iostream>
using namespace Eigen;
using namespace std;

// define a custom template unary functor
template<typename Scalar>
struct CwiseClampOp {
  CwiseClampOp(const Scalar& inf, const Scalar& sup) : m_inf(inf), m_sup(sup) {}
  const Scalar operator()(const Scalar& x) const { return x<m_inf ? m_inf : (x>m_sup ? m_sup : x); }
  Scalar m_inf, m_sup;
};

int main(int, char**)
{
  Matrix4d m1 = Matrix4d::Random();
  cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(CwiseClampOp<double>(-0.5,0.5)) << endl;
  return 0;
}

Output:

See also

unaryExpr, binaryExpr class CwiseUnaryOp

Definition at line 142 of file CommonCwiseUnaryOps.h.