CustomKernel.cpp

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/*
 * 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 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 1999-2009 Soeren Sonnenburg
 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#include <shogun/lib/common.h>
#include <shogun/kernel/CustomKernel.h>
#include <shogun/features/Features.h>
#include <shogun/features/DummyFeatures.h>
#include <shogun/io/SGIO.h>

using namespace shogun;

void
CCustomKernel::init()
{
    m_parameters->add(&kmatrix, "kmatrix", "Kernel matrix.");
    m_parameters->add(&upper_diagonal, "upper_diagonal");
}

CCustomKernel::CCustomKernel()
: CKernel(10), kmatrix(), upper_diagonal(false)
{
    init();
}

CCustomKernel::CCustomKernel(CKernel* k)
: CKernel(10)
{
    set_full_kernel_matrix_from_full(k->get_kernel_matrix());
}

CCustomKernel::CCustomKernel(SGMatrix<float64_t> km)
: CKernel(10), upper_diagonal(false)
{
    init();
    set_full_kernel_matrix_from_full(km);
}

CCustomKernel::~CCustomKernel()
{
    cleanup();
}

bool CCustomKernel::dummy_init(int32_t rows, int32_t cols)
{
    return init(new CDummyFeatures(rows), new CDummyFeatures(cols));
}

bool CCustomKernel::init(CFeatures* l, CFeatures* r)
{
    CKernel::init(l, r);

    SG_DEBUG( "num_vec_lhs: %d vs num_rows %d\n", l->get_num_vectors(), kmatrix.num_rows);
    SG_DEBUG( "num_vec_rhs: %d vs num_cols %d\n", r->get_num_vectors(), kmatrix.num_cols);
    ASSERT(l->get_num_vectors()==kmatrix.num_rows);
    ASSERT(r->get_num_vectors()==kmatrix.num_cols);
    return init_normalizer();
}

void CCustomKernel::cleanup_custom()
{
    SG_DEBUG("cleanup up custom kernel\n");
    SG_FREE(kmatrix.matrix);
    kmatrix.matrix=NULL;
    upper_diagonal=false;
    kmatrix.num_cols=0;
    kmatrix.num_rows=0;
}

void CCustomKernel::cleanup()
{
    cleanup_custom();
    CKernel::cleanup();
}