PLearn::VarColumnsVariable Class Reference

#include <VarColumnsVariable.h>

Inheritance diagram for PLearn::VarColumnsVariable:

[legend]Collaboration diagram for PLearn::VarColumnsVariable:

[legend]List of all members.

Public Member Functions
	VarColumnsVariable ()
	Default constructor for persistence.
	VarColumnsVariable (Variable *input1, Variable *input2)
	PLEARN_DECLARE_OBJECT (VarColumnsVariable)
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

Variable that is a subset of a matrix's columns input1 : matrix from which columns are selected input2 : vector whose elements are row indices in input1

Definition at line 56 of file VarColumnsVariable.h.

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Member Typedef Documentation

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

Reimplemented from PLearn::BinaryVariable. Definition at line 58 of file VarColumnsVariable.h. Referenced by VarColumnsVariable().

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Constructor & Destructor Documentation

PLearn::VarColumnsVariable::VarColumnsVariable (   )  [inline]

Default constructor for persistence. Definition at line 62 of file VarColumnsVariable.h.

PLearn::VarColumnsVariable::VarColumnsVariable (  Variable *  input1, Variable *  input2 )

Definition at line 53 of file VarColumnsVariable.cc. References inherited.

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Member Function Documentation

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

Implements PLearn::Variable. Definition at line 76 of file VarColumnsVariable.cc. References PLearn::TMat< T >::column(), PLearn::Var::column(), and PLearn::Var::length().

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

compute output given input Implements PLearn::Variable. Definition at line 70 of file VarColumnsVariable.cc.

PLearn::VarColumnsVariable::PLEARN_DECLARE_OBJECT (  VarColumnsVariable   )

void PLearn::VarColumnsVariable::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 60 of file VarColumnsVariable.cc. References PLearn::Var::length().

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

compute a piece of new Var graph that represents the symbolic derivative of this Var Reimplemented from PLearn::Variable. Definition at line 83 of file VarColumnsVariable.cc. References PLERROR.

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

• VarColumnsVariable.h
• VarColumnsVariable.cc

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