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

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

#include <TimesScalarVariable.h>

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List of all members.

Public Member Functions

 TimesScalarVariable ()
 Default constructor.
 TimesScalarVariable (Variable *input1, Variable *input2, bool call_build_=true)
 Convenience constructor.
virtual string classname () const
virtual OptionListgetOptionList () const
virtual OptionMapgetOptionMap () const
virtual RemoteMethodMapgetRemoteMethodMap () const
virtual TimesScalarVariabledeepCopy (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
virtual void rfprop ()

Static Public Member Functions

static string _classname_ ()
 TimesScalarVariable.
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_

Private Types

typedef BinaryVariable inherited

Private Member Functions

void build_ ()
 This does the actual building.

Detailed Description

multiplies a matrix var by a scalar var

Definition at line 53 of file TimesScalarVariable.h.


Member Typedef Documentation

Reimplemented from PLearn::BinaryVariable.

Definition at line 55 of file TimesScalarVariable.h.


Constructor & Destructor Documentation

PLearn::TimesScalarVariable::TimesScalarVariable ( ) [inline]

Default constructor.

Definition at line 60 of file TimesScalarVariable.h.

{}
PLearn::TimesScalarVariable::TimesScalarVariable ( Variable input1,
Variable input2,
bool  call_build_ = true 
)

Convenience constructor.

Definition at line 62 of file TimesScalarVariable.cc.

References build_().

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

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Member Function Documentation

string PLearn::TimesScalarVariable::_classname_ ( ) [static]

TimesScalarVariable.

Reimplemented from PLearn::BinaryVariable.

Definition at line 57 of file TimesScalarVariable.cc.

OptionList & PLearn::TimesScalarVariable::_getOptionList_ ( ) [static]

Reimplemented from PLearn::BinaryVariable.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::Object.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 57 of file TimesScalarVariable.cc.

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

Implements PLearn::Variable.

Definition at line 103 of file TimesScalarVariable.cc.

References PLearn::Variable::gradientdata, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, and PLearn::Variable::nelems().

{
    for(int k=0; k<nelems(); k++)
    {
        input1->gradientdata[k] += input2->valuedata[0]*gradientdata[k];
        input2->gradientdata[0] += input1->valuedata[k]*gradientdata[k];
    }
}

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void PLearn::TimesScalarVariable::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 73 of file TimesScalarVariable.cc.

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

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void PLearn::TimesScalarVariable::build_ ( ) [private]

This does the actual building.

Reimplemented from PLearn::BinaryVariable.

Definition at line 80 of file TimesScalarVariable.cc.

References PLearn::BinaryVariable::input2, and PLERROR.

Referenced by build(), and TimesScalarVariable().

{
    if (input2 && !input2->isScalar())
        PLERROR("IN TimesScalarVariable: input2 is not a scalar");
}

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

Reimplemented from PLearn::Object.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 66 of file TimesScalarVariable.h.

:

TimesScalarVariable * PLearn::TimesScalarVariable::deepCopy ( CopiesMap copies) const [virtual]

Reimplemented from PLearn::BinaryVariable.

Definition at line 57 of file TimesScalarVariable.cc.

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

compute output given input

Implements PLearn::Variable.

Definition at line 95 of file TimesScalarVariable.cc.

References PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, PLearn::Variable::nelems(), and PLearn::Variable::valuedata.

{
    real scal = input2->valuedata[0];
    for(int k=0; k<nelems(); k++)
        valuedata[k] = input1->valuedata[k] * scal;
}

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

Reimplemented from PLearn::Object.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::Object.

Definition at line 57 of file TimesScalarVariable.cc.

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

Reimplemented from PLearn::Object.

Definition at line 57 of file TimesScalarVariable.cc.

void PLearn::TimesScalarVariable::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 86 of file TimesScalarVariable.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::TimesScalarVariable::rfprop ( ) [virtual]

Reimplemented from PLearn::Variable.

Definition at line 121 of file TimesScalarVariable.cc.

References PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, PLearn::TVec< T >::length(), PLearn::Variable::nelems(), PLearn::BinaryVariable::resizeRValue(), PLearn::Variable::rValue, and PLearn::Variable::rvaluedata.

{
    if (rValue.length()==0) resizeRValue();
    real scal = input2->valuedata[0];
    real rscal = input2->rvaluedata[0];
    for(int k=0; k<nelems(); k++)
        rvaluedata[k] = input1->rvaluedata[k] * scal + input1->valuedata[k] * rscal;
}

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

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

Reimplemented from PLearn::Variable.

Definition at line 113 of file TimesScalarVariable.cc.

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

{
    input1->accg(g*input2);
    input2->accg(dot(g,input1));
}

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Member Data Documentation

Reimplemented from PLearn::BinaryVariable.

Definition at line 66 of file TimesScalarVariable.h.


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