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PLearn::VarElementVariable Class Reference

#include <VarElementVariable.h>

Inheritance diagram for PLearn::VarElementVariable:

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List of all members.

Public Member Functions

 VarElementVariable ()
 Default constructor for persistence.

 VarElementVariable (Variable *input1, Variable *input2)
 PLEARN_DECLARE_OBJECT (VarElementVariable)
virtual void build ()
 Should call simply inherited::build(), then this class's build_().

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 ()

Protected Member Functions

void build_ ()

Private Types

typedef BinaryVariable inherited

Detailed Description

Variable that is the element of the input1 variable indexed by the input2 variable. If input2 has 2 elements, they are interpreted as the (i,j) indexes If input2 is a scalar, it is interpreted as the k index of a vec view of input1

Definition at line 57 of file VarElementVariable.h.


Member Typedef Documentation

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 59 of file VarElementVariable.h.

Referenced by VarElementVariable().


Constructor & Destructor Documentation

PLearn::VarElementVariable::VarElementVariable  )  [inline]
 

Default constructor for persistence.

Definition at line 63 of file VarElementVariable.h.

PLearn::VarElementVariable::VarElementVariable Variable input1,
Variable input2
 

Definition at line 56 of file VarElementVariable.cc.

References build_(), and inherited.


Member Function Documentation

void PLearn::VarElementVariable::bprop  )  [virtual]
 

Implements PLearn::Variable.

Definition at line 104 of file VarElementVariable.cc.

References k, and PLearn::Var::width().

void PLearn::VarElementVariable::build  )  [virtual]
 

Should call simply inherited::build(), then this class's build_().

This method should be callable again at later times, after modifying some option fields to change the "architecture" of the object.

Reimplemented from PLearn::Variable.

Definition at line 63 of file VarElementVariable.cc.

References build_().

void PLearn::VarElementVariable::build_  )  [protected]
 

This method should be redefined in subclasses and do the actual building of the object according to previously set option fields. Constructors can just set option fields, and then call build_. This method is NOT virtual, and will typically be called only from three places: a constructor, the public virtual build() method, and possibly the public virtual read method (which calls its parent's read). build_() can assume that it's parent's build_ has already been called.

Reimplemented from PLearn::Variable.

Definition at line 70 of file VarElementVariable.cc.

References PLERROR.

Referenced by build(), and VarElementVariable().

void PLearn::VarElementVariable::fprop  )  [virtual]
 

compute output given input

Implements PLearn::Variable.

Definition at line 79 of file VarElementVariable.cc.

References k, PLearn::Var::length(), PLERROR, and PLearn::Var::width().

PLearn::VarElementVariable::PLEARN_DECLARE_OBJECT VarElementVariable   ) 
 

void PLearn::VarElementVariable::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 76 of file VarElementVariable.cc.

void PLearn::VarElementVariable::rfprop  )  [virtual]
 

Reimplemented from PLearn::Variable.

Definition at line 126 of file VarElementVariable.cc.

References k, PLearn::TVec< T >::length(), PLearn::BinaryVariable::resizeRValue(), and PLearn::Var::width().

void PLearn::VarElementVariable::symbolicBprop  )  [virtual]
 

compute a piece of new Var graph that represents the symbolic derivative of this Var

Reimplemented from PLearn::Variable.

Definition at line 120 of file VarElementVariable.cc.

References PLearn::Var::length(), and PLearn::Var::width().


The documentation for this class was generated from the following files:
Generated on Tue Aug 17 16:25:54 2004 for PLearn by doxygen 1.3.7