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

#include <IndexAtPositionVariable.h>

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List of all members.

Public Member Functions

 IndexAtPositionVariable ()
 Default constructor for persistence.
 IndexAtPositionVariable (Variable *input1, Variable *input2, int the_length, int the_width)
virtual string classname () const
virtual OptionListgetOptionList () const
virtual OptionMapgetOptionMap () const
virtual RemoteMethodMapgetRemoteMethodMap () const
virtual IndexAtPositionVariabledeepCopy (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_ ()
 IndexAtPositionVariable.
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 void declareOptions (OptionList &ol)
 Declare options (data fields) for the class.

Static Public Attributes

static StaticInitializer _static_initializer_

Protected Member Functions

void build_ ()
 This does the actual building.

Protected Attributes

int length_
int width_

Private Types

typedef BinaryVariable inherited

Detailed Description

Definition at line 52 of file IndexAtPositionVariable.h.


Member Typedef Documentation

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.h.


Constructor & Destructor Documentation

PLearn::IndexAtPositionVariable::IndexAtPositionVariable ( )

Default constructor for persistence.

Definition at line 57 of file IndexAtPositionVariable.cc.

    : length_(0), width_(0)
{ }
PLearn::IndexAtPositionVariable::IndexAtPositionVariable ( Variable input1,
Variable input2,
int  the_length,
int  the_width 
)

Definition at line 61 of file IndexAtPositionVariable.cc.

References build_().

    : inherited(input1, input2, the_length, the_width), length_(the_length), width_(the_width)
{
    build_();
}

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Member Function Documentation

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

IndexAtPositionVariable.

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::Object.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Implements PLearn::Variable.

Definition at line 108 of file IndexAtPositionVariable.cc.

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

{
    for (int j=0; j<input2->size(); j++)
    {
        int i = (int)input2->valuedata[j];
        input1->gradientdata[i*width()+j] += gradientdata[j];
    }
}

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void PLearn::IndexAtPositionVariable::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 68 of file IndexAtPositionVariable.cc.

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

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

This does the actual building.

Reimplemented from PLearn::BinaryVariable.

Definition at line 75 of file IndexAtPositionVariable.cc.

References PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, PLERROR, and width_.

Referenced by build(), and IndexAtPositionVariable().

{
    if (input1 && input2) {
        if(!input1->isVec() || !input2->isVec())
            PLERROR("In IndexAtPositionVariable: input1 or input2 must be a vector var");
        if(input1->size() != input2->size() || input1->size() != width_)
            PLERROR("In IndexAtPositionVariable: input1 and input2 should be of same size");
    }
}

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

Reimplemented from PLearn::Object.

Definition at line 54 of file IndexAtPositionVariable.cc.

void PLearn::IndexAtPositionVariable::declareOptions ( OptionList ol) [static]

Declare options (data fields) for the class.

Redefine this in subclasses: call declareOption(...) for each option, and then call inherited::declareOptions(options). Please call the inherited method AT THE END to get the options listed in a consistent order (from most recently defined to least recently defined).

  static void MyDerivedClass::declareOptions(OptionList& ol)
  {
      declareOption(ol, "inputsize", &MyObject::inputsize_,
                    OptionBase::buildoption,
                    "The size of the input; it must be provided");
      declareOption(ol, "weights", &MyObject::weights,
                    OptionBase::learntoption,
                    "The learned model weights");
      inherited::declareOptions(ol);
  }
Parameters:
olList of options that is progressively being constructed for the current class.

Reimplemented from PLearn::BinaryVariable.

Definition at line 86 of file IndexAtPositionVariable.cc.

References PLearn::OptionBase::buildoption, PLearn::declareOption(), PLearn::BinaryVariable::declareOptions(), length_, and width_.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 64 of file IndexAtPositionVariable.h.

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

Reimplemented from PLearn::BinaryVariable.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

compute output given input

Implements PLearn::Variable.

Definition at line 97 of file IndexAtPositionVariable.cc.

References PLearn::TVec< T >::clear(), i, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, j, PLearn::Variable::value, PLearn::Variable::valuedata, and PLearn::Variable::width().

{
    value.clear();
    for (int j=0; j<input2->size(); j++)
    {  
        int i = (int)input2->valuedata[j];
        valuedata[i*width()+j] = input1->valuedata[j];
    }
}

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

Reimplemented from PLearn::Object.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::Object.

Definition at line 54 of file IndexAtPositionVariable.cc.

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

Reimplemented from PLearn::Object.

Definition at line 54 of file IndexAtPositionVariable.cc.

void PLearn::IndexAtPositionVariable::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 93 of file IndexAtPositionVariable.cc.

References length_, and width_.

{ l=length_; w=width_; }
void PLearn::IndexAtPositionVariable::rfprop ( ) [virtual]

Reimplemented from PLearn::Variable.

Definition at line 124 of file IndexAtPositionVariable.cc.

References PLERROR.

{
/*  if (rValue.length()==0) resizeRValue();
    rValue.clear();
    if (input2->isScalar()) // input2 is a scalar (interpreted as a k)
    {
    int k = (int)input2->valuedata[0];
    rvaluedata[k] = input1->rvaluedata[0];
    }
    else // input2 has 2 Indexs (interpreted as (i,j) coordinates)
    {
    int i = (int)input2->valuedata[0];
    int j = (int)input2->valuedata[1];
    rvaluedata[i*width()+j] = input1->rvaluedata[0];
    }*/
    PLERROR("IndexAtPositionVariable::rfprop() not implemented.");
}
void PLearn::IndexAtPositionVariable::symbolicBprop ( ) [virtual]

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

Reimplemented from PLearn::Variable.

Definition at line 118 of file IndexAtPositionVariable.cc.

References PLearn::Variable::g, PLearn::BinaryVariable::input1, and PLearn::BinaryVariable::input2.

{
    input1->accg(new ColumnIndexVariable(g,input2));
}

Member Data Documentation

Reimplemented from PLearn::BinaryVariable.

Definition at line 64 of file IndexAtPositionVariable.h.

Definition at line 57 of file IndexAtPositionVariable.h.

Referenced by declareOptions(), and recomputeSize().

Definition at line 57 of file IndexAtPositionVariable.h.

Referenced by build_(), declareOptions(), and recomputeSize().


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