PLearn::TimesConstantVariable Class Reference

multiplies a matrix var by a scalar constant More...

#include <TimesConstantVariable.h>

Inheritance diagram for PLearn::TimesConstantVariable:

[legend]Collaboration diagram for PLearn::TimesConstantVariable:

[legend]List of all members.

Public Member Functions
	TimesConstantVariable ()
	Default constructor for persistence.
	TimesConstantVariable (Variable *input, real c)
	PLEARN_DECLARE_OBJECT (TimesConstantVariable)
virtual string	info () const
	returns a bit more informative string about object (default returns classname())
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
virtual void	rfprop ()
Public Attributes
real	cst
	The constant.
Private Types
typedef UnaryVariable	inherited

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Detailed Description

multiplies a matrix var by a scalar constant

* Times... *

Definition at line 57 of file TimesConstantVariable.h.

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Member Typedef Documentation

typedef UnaryVariable PLearn::TimesConstantVariable::inherited [private]

Reimplemented from PLearn::UnaryVariable. Definition at line 59 of file TimesConstantVariable.h. Referenced by TimesConstantVariable().

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Constructor & Destructor Documentation

PLearn::TimesConstantVariable::TimesConstantVariable (   )  [inline]

Default constructor for persistence. Definition at line 67 of file TimesConstantVariable.h. References cst.

PLearn::TimesConstantVariable::TimesConstantVariable (  Variable *  input, real  c )

Definition at line 56 of file TimesConstantVariable.cc. References inherited.

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Member Function Documentation

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

Implements PLearn::Variable. Definition at line 76 of file TimesConstantVariable.cc. References cst, k, and PLearn::Variable::nelems().

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

compute output given input Implements PLearn::Variable. Definition at line 69 of file TimesConstantVariable.cc. References cst, k, and PLearn::Variable::nelems().

virtual string PLearn::TimesConstantVariable::info (   )  const [inline, virtual]

returns a bit more informative string about object (default returns classname()) Reimplemented from PLearn::Object. Definition at line 72 of file TimesConstantVariable.h. References cst, and PLearn::tostring().

PLearn::TimesConstantVariable::PLEARN_DECLARE_OBJECT (  TimesConstantVariable   )

void PLearn::TimesConstantVariable::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 TimesConstantVariable.cc. References PLearn::Var::length(), and PLearn::Var::width().

void PLearn::TimesConstantVariable::rfprop (   )  [virtual]

Reimplemented from PLearn::Variable. Definition at line 90 of file TimesConstantVariable.cc. References cst, k, PLearn::TVec< T >::length(), PLearn::Variable::nelems(), and PLearn::UnaryVariable::resizeRValue().

void PLearn::TimesConstantVariable::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 TimesConstantVariable.cc. References cst.

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Member Data Documentation

real PLearn::TimesConstantVariable::cst

The constant. Definition at line 63 of file TimesConstantVariable.h. Referenced by bprop(), fprop(), info(), rfprop(), symbolicBprop(), and TimesConstantVariable().

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

• TimesConstantVariable.h
• TimesConstantVariable.cc

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