PLearn::MatrixAffineTransformVariable Class Reference

Affine transformation of a MATRIX variable. More...

#include <MatrixAffineTransformVariable.h>

Inheritance diagram for PLearn::MatrixAffineTransformVariable:

[legend]Collaboration diagram for PLearn::MatrixAffineTransformVariable:

[legend]List of all members.

Public Member Functions
	MatrixAffineTransformVariable ()
	Default constructor for persistence.
	MatrixAffineTransformVariable (Variable *mat, Variable *transformation)
	PLEARN_DECLARE_OBJECT (MatrixAffineTransformVariable)
virtual void	recomputeSize (int &l, int &w) const
	Recomputes the length l and width w that this variable should have, according to its parent variables.
virtual void	fprop ()
	compute output given input
virtual void	bprop ()
virtual void	symbolicBprop ()
	compute a piece of new Var graph that represents the symbolic derivative of this Var
Private Types
typedef BinaryVariable	inherited

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Detailed Description

Affine transformation of a MATRIX variable.

Should work for both column and row vectors: result vector will be of same kind (row or col) First row of transformation matrix contains bias b, following rows contain linear-transformation T Will compute b + x.T which is equivalent to b +

Definition at line 57 of file MatrixAffineTransformVariable.h.

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Member Typedef Documentation

typedef BinaryVariable PLearn::MatrixAffineTransformVariable::inherited [private]

Reimplemented from PLearn::BinaryVariable. Definition at line 59 of file MatrixAffineTransformVariable.h.

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Constructor & Destructor Documentation

PLearn::MatrixAffineTransformVariable::MatrixAffineTransformVariable (   )  [inline]

Default constructor for persistence. Definition at line 63 of file MatrixAffineTransformVariable.h.

PLearn::MatrixAffineTransformVariable::MatrixAffineTransformVariable (  Variable *  mat, Variable *  transformation )  [inline]

Definition at line 64 of file MatrixAffineTransformVariable.h.

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Member Function Documentation

void PLearn::MatrixAffineTransformVariable::bprop (   )  [virtual]

Implements PLearn::Variable. Definition at line 76 of file MatrixAffineTransformVariable.cc. References PLearn::TMat< T >::firstRow(), PLearn::Variable::length(), PLearn::TMat< T >::length(), PLearn::productAcc(), PLearn::productTransposeAcc(), PLearn::TMat< T >::subMatRows(), PLearn::Vec, and PLearn::Variable::width().

void PLearn::MatrixAffineTransformVariable::fprop (   )  [virtual]

compute output given input Implements PLearn::Variable. Definition at line 66 of file MatrixAffineTransformVariable.cc. References PLearn::Variable::length(), PLearn::Var::length(), PLearn::Mat, PLearn::transposeProductAcc(), and PLearn::Variable::width().

PLearn::MatrixAffineTransformVariable::PLEARN_DECLARE_OBJECT (  MatrixAffineTransformVariable   )

void PLearn::MatrixAffineTransformVariable::recomputeSize (  int &  l, int &  w )  const [virtual]

Recomputes the length l and width w that this variable should have, according to its parent variables. This is used for ex. by sizeprop() The default version stupidly returns the current dimensions, so make sure to overload it in subclasses if this is not appropriate. Reimplemented from PLearn::Variable. Definition at line 56 of file MatrixAffineTransformVariable.cc. References PLearn::Var::width().

void PLearn::MatrixAffineTransformVariable::symbolicBprop (   )  [virtual]

compute a piece of new Var graph that represents the symbolic derivative of this Var Reimplemented from PLearn::Variable. Definition at line 97 of file MatrixAffineTransformVariable.cc. References PLearn::Var::length(), and PLearn::Var::width().

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

• MatrixAffineTransformVariable.h
• MatrixAffineTransformVariable.cc

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