nnfw/src/normlinker.cpp

/********************************************************************************
 *  Neural Network Framework.                                                   *
 *  Copyright (C) 2005-2011 Gianluca Massera <emmegian@yahoo.it>                *
 *                                                                              *
 *  This program is free software; you can redistribute it and/or modify        *
 *  it under the terms of the GNU General Public License as published by        *
 *  the Free Software Foundation; either version 2 of the License, or           *
 *  (at your option) any later version.                                         *
 *                                                                              *
 *  This program is distributed in the hope that it will be useful,             *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of              *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               *
 *  GNU General Public License for more details.                                *
 *                                                                              *
 *  You should have received a copy of the GNU General Public License           *
 *  along with this program; if not, write to the Free Software                 *
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA  *
 ********************************************************************************/

#include "normlinker.h"
#include <cmath>

namespace farsa {

NormLinker::NormLinker( Cluster* from, Cluster* to, QString name )
    : MatrixLinker(from, to, name), temp( from->numNeurons() ) {
}

NormLinker::NormLinker( ConfigurationParameters& params, QString prefix )
    : MatrixLinker( params, prefix ) {
    // there are no extra parameters to configure
}

NormLinker::~NormLinker() {
}

void NormLinker::update() {
    // check if cluster 'To' needs a reset
    if ( to()->needReset() ) {
        to()->resetInputs();
    }
    const DoubleVector& outs = fromVector();
    DoubleVector& ins = toVector();
    const DoubleMatrix& mat = matrix();
    temp.zeroing();
    for( unsigned int j=0; j<cols(); j++ ) {
        ins[j] += sqrt( sum( square( subtract( temp, outs, mat.column(j) ) ) ) );
    }
    return;
}

void NormLinker::save(ConfigurationParameters& params, QString prefix) {
    MatrixLinker::save( params, prefix );
    params.startObjectParameters( prefix, "NormLinker", this );
}

}