PLearn 0.1
Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions | Private Types
PLearn::MinusTransposedColumnVariable Class Reference

#include <MinusTransposedColumnVariable.h>

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List of all members.

Public Member Functions

 MinusTransposedColumnVariable ()
 Default constructor for persistence.
 MinusTransposedColumnVariable (Variable *input1, Variable *input2)
virtual string classname () const
virtual OptionListgetOptionList () const
virtual OptionMapgetOptionMap () const
virtual RemoteMethodMapgetRemoteMethodMap () const
virtual
MinusTransposedColumnVariable
deepCopy (CopiesMap &copies) const
virtual void build ()
 Post-constructor.
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

static string _classname_ ()
 MinusTransposedColumnVariable.
static OptionList_getOptionList_ ()
static RemoteMethodMap_getRemoteMethodMap_ ()
static Object_new_instance_for_typemap_ ()
static bool _isa_ (const Object *o)
static void _static_initialize_ ()
static const PPathdeclaringFile ()

Static Public Attributes

static StaticInitializer _static_initializer_

Protected Member Functions

void build_ ()
 This does the actual building.

Private Types

typedef BinaryVariable inherited

Detailed Description

Definition at line 52 of file MinusTransposedColumnVariable.h.


Member Typedef Documentation

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file MinusTransposedColumnVariable.h.


Constructor & Destructor Documentation

PLearn::MinusTransposedColumnVariable::MinusTransposedColumnVariable ( ) [inline]

Default constructor for persistence.

Definition at line 58 of file MinusTransposedColumnVariable.h.

{}
PLearn::MinusTransposedColumnVariable::MinusTransposedColumnVariable ( Variable input1,
Variable input2 
)

Definition at line 58 of file MinusTransposedColumnVariable.cc.

References build_().

    : inherited(input1, input2, input1->length(), input1->width())
{
    build_();
}

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Member Function Documentation

string PLearn::MinusTransposedColumnVariable::_classname_ ( ) [static]
OptionList & PLearn::MinusTransposedColumnVariable::_getOptionList_ ( ) [static]

Reimplemented from PLearn::BinaryVariable.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

RemoteMethodMap & PLearn::MinusTransposedColumnVariable::_getRemoteMethodMap_ ( ) [static]

Reimplemented from PLearn::BinaryVariable.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

bool PLearn::MinusTransposedColumnVariable::_isa_ ( const Object o) [static]

Reimplemented from PLearn::BinaryVariable.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

Object * PLearn::MinusTransposedColumnVariable::_new_instance_for_typemap_ ( ) [static]

Reimplemented from PLearn::Object.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

StaticInitializer MinusTransposedColumnVariable::_static_initializer_ & PLearn::MinusTransposedColumnVariable::_static_initialize_ ( ) [static]

Reimplemented from PLearn::BinaryVariable.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

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

Implements PLearn::Variable.

Definition at line 102 of file MinusTransposedColumnVariable.cc.

References PLearn::Variable::gradientdata, i, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, j, PLearn::Variable::length(), and PLearn::Variable::width().

{
    int k=0;
    real* i2g = input2->gradientdata;
    real* i1g = input1->gradientdata;
    for(int i=0; i<length(); i++)
        for(int j=0; j<width(); j++, k++)
        {
            i1g[k] += gradientdata[k];
            i2g[j] -= gradientdata[k];
        }
}

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void PLearn::MinusTransposedColumnVariable::build ( ) [virtual]

Post-constructor.

The normal implementation 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::BinaryVariable.

Definition at line 65 of file MinusTransposedColumnVariable.cc.

References PLearn::BinaryVariable::build(), and build_().

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void PLearn::MinusTransposedColumnVariable::build_ ( ) [protected]

This does the actual building.

Reimplemented from PLearn::BinaryVariable.

Definition at line 72 of file MinusTransposedColumnVariable.cc.

References PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, PLearn::Var::length(), PLERROR, and PLearn::Var::width().

Referenced by build(), and MinusTransposedColumnVariable().

{
    if (input1 && input2) {
        if(!input2->isColumnVec())
            PLERROR("IN MinusTransposedColumnVariable: input2 is not a column");
        if(input2->length() != input1->width())
            PLERROR("IN MinusTransposedColumnVariable: the width() of input1 and the length() of input2 differ");
    }
}

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string PLearn::MinusTransposedColumnVariable::classname ( ) const [virtual]

Reimplemented from PLearn::Object.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

static const PPath& PLearn::MinusTransposedColumnVariable::declaringFile ( ) [inline, static]

Reimplemented from PLearn::BinaryVariable.

Definition at line 61 of file MinusTransposedColumnVariable.h.

:
    void build_();
MinusTransposedColumnVariable * PLearn::MinusTransposedColumnVariable::deepCopy ( CopiesMap copies) const [virtual]

Reimplemented from PLearn::BinaryVariable.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

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

compute output given input

Implements PLearn::Variable.

Definition at line 91 of file MinusTransposedColumnVariable.cc.

References i, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, j, PLearn::Variable::length(), PLearn::Variable::valuedata, and PLearn::Variable::width().

{
    int k=0;
    real* i2 = input2->valuedata;
    real* i1 = input1->valuedata;
    for(int i=0; i<length(); i++)
        for(int j=0; j<width(); j++, k++)
            valuedata[k] = i1[k] - i2[j];
}

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OptionList & PLearn::MinusTransposedColumnVariable::getOptionList ( ) const [virtual]

Reimplemented from PLearn::Object.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

OptionMap & PLearn::MinusTransposedColumnVariable::getOptionMap ( ) const [virtual]

Reimplemented from PLearn::Object.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

RemoteMethodMap & PLearn::MinusTransposedColumnVariable::getRemoteMethodMap ( ) const [virtual]

Reimplemented from PLearn::Object.

Definition at line 56 of file MinusTransposedColumnVariable.cc.

void PLearn::MinusTransposedColumnVariable::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 82 of file MinusTransposedColumnVariable.cc.

References PLearn::BinaryVariable::input1, PLearn::Var::length(), and PLearn::Var::width().

{
    if (input1) {
        l = input1->length();
        w = input1->width();
    } else
        l = w = 0;
}

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

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

Reimplemented from PLearn::Variable.

Definition at line 116 of file MinusTransposedColumnVariable.cc.

References PLearn::columnSum(), PLearn::Variable::g, PLearn::BinaryVariable::input1, and PLearn::BinaryVariable::input2.

{
    input1->accg(g);
    input2->accg(-columnSum(g));
}

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Member Data Documentation

Reimplemented from PLearn::BinaryVariable.

Definition at line 61 of file MinusTransposedColumnVariable.h.


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