PLearn::PowVariable Class Reference

elementwise pow (returns 0 wherever input is negative) More...

#include <PowVariable.h>

Inheritance diagram for PLearn::PowVariable:

[legend]Collaboration diagram for PLearn::PowVariable:

[legend]List of all members.

Public Member Functions
	PowVariable ()
	Default constructor for persistence.
	PowVariable (Variable *input, real the_power)
	PLEARN_DECLARE_OBJECT (PowVariable)
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
Static Public Member Functions
void	declareOptions (OptionList &ol)
	redefine this in subclasses: call declareOption(...) for each option, and then call inherited::declareOptions(options) ( see the declareOption function further down)
Protected Attributes
real	power
Private Types
typedef UnaryVariable	inherited

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Detailed Description

elementwise pow (returns 0 wherever input is negative)

Definition at line 54 of file PowVariable.h.

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Member Typedef Documentation

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

Reimplemented from PLearn::UnaryVariable. Definition at line 56 of file PowVariable.h. Referenced by PowVariable().

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Constructor & Destructor Documentation

PLearn::PowVariable::PowVariable (   )  [inline]

Default constructor for persistence. Definition at line 63 of file PowVariable.h. References power.

PLearn::PowVariable::PowVariable (  Variable *  input, real  the_power )

Definition at line 57 of file PowVariable.cc. References inherited.

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Member Function Documentation

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

Implements PLearn::Variable. Definition at line 84 of file PowVariable.cc. References PLearn::mypow(), PLearn::Variable::nelems(), and power.

void PLearn::PowVariable::declareOptions (  OptionList &  ol  )  [static]

redefine this in subclasses: call declareOption(...) for each option, and then call inherited::declareOptions(options) ( see the declareOption function further down) ex: static void declareOptions(OptionList& ol) { declareOption(ol, "inputsize", &MyObject::inputsize_, OptionBase::buildoption, "the size of the input\n it must be provided"); declareOption(ol, "weights", &MyObject::weights, OptionBase::learntoption, "the learnt model weights"); inherited::declareOptions(ol); } Reimplemented from PLearn::UnaryVariable. Definition at line 62 of file PowVariable.cc. References PLearn::declareOption(), and PLearn::OptionList.

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

compute output given input Implements PLearn::Variable. Definition at line 77 of file PowVariable.cc. References PLearn::mypow(), PLearn::Variable::nelems(), and power.

PLearn::PowVariable::PLEARN_DECLARE_OBJECT (  PowVariable   )

void PLearn::PowVariable::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 68 of file PowVariable.cc. References PLearn::Var::length(), and PLearn::Var::width().

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

compute a piece of new Var graph that represents the symbolic derivative of this Var Reimplemented from PLearn::Variable. Definition at line 91 of file PowVariable.cc. References PLearn::pow(), and power.

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Member Data Documentation

real PLearn::PowVariable::power [protected]

Definition at line 59 of file PowVariable.h. Referenced by bprop(), fprop(), PowVariable(), and symbolicBprop().

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

• PowVariable.h
• PowVariable.cc

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