Perceptron.cpp

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//===========================================================================
//===========================================================================


#include <ReClaM/Perceptron.h>


Perceptron::Perceptron()
{
}

Perceptron::~Perceptron()
{
}


void Perceptron::init(Model& model)
{
    SVM* svm = dynamic_cast<SVM*>(&model);
    if (svm == NULL) throw SHARKEXCEPTION("[Perceptron::init] model is not a valid SVM object");
}

void Perceptron::optimize(SVM& svm, const Array<double>& input, const Array<double>& target)
{
    int i, ic = input.dim(0);
    bool err;
    int iter = 0;

    svm.SetTrainingData(input);
    for (i = 0; i <= ic; i++) svm.setParameter(i, 0.0);

    do
    {
        err = false;
        for (i = 0; i < ic; i++)
        {
            if (svm.model(input[i]) * target(i, 0) <= 0.0)
            {
                svm.setParameter(i, svm.getParameter(i) + target(i, 0));
                err = true;
            }
        }
        if (iter > 10000 * ic) break;   // probably non-separable data
        iter++;
    }
    while (err);
}

double Perceptron::optimize(Model& model, ErrorFunction& error, const Array<double>& input, const Array<double>& target)
{
    SVM* svm = dynamic_cast<SVM*>(&model);
    if (svm == NULL) throw SHARKEXCEPTION("[Perceptron::optimize] model is not a valid SVM object");

    optimize(*svm, input, target);
    return 0.0;
}