RightPseudoInverseVariable.cc

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
// Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
// Copyright (C) 2002 Xiangdong Wang, Christian Dorion

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
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/* *******************************************************      
   * $Id: RightPseudoInverseVariable.cc,v 1.5 2004/04/27 15:58:16 morinf Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#include "RightPseudoInverseVariable.h"

namespace PLearn {
using namespace std;


PLEARN_IMPLEMENT_OBJECT(RightPseudoInverseVariable,
                        "ONE LINE DESCR",
                        "NO HELP");

RightPseudoInverseVariable::RightPseudoInverseVariable(Variable* input)
  : inherited(input, input->length(), input->width()) 
{
    build_();
}

void
RightPseudoInverseVariable::build()
{
    inherited::build();
    build_();
}

void
RightPseudoInverseVariable::build_()
{
    if (input && input->width() > input->length())
        PLERROR("RightPseudoInverseVariable(Var): input width_(%d) > length_(%d)",
                input->width(), input->length());
}

void RightPseudoInverseVariable::recomputeSize(int& l, int& w) const
{
    if (input) {
        l = input->length();
        w = input->width();
    } else
        l = w = 0;
}

void RightPseudoInverseVariable::fprop()
{
  rightPseudoInverse(input->matValue,matValue);
}


void RightPseudoInverseVariable::bprop()
{
  PLERROR("RightPseudoInverseVariable: bprop not implemented yet");
}


void RightPseudoInverseVariable::symbolicBprop()
{
  PLERROR("RightPseudoInverseVariable: symbolicBprop not implemented yet");
}



} // end of namespace PLearn

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