KernelTwoSampleTest.h

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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) 2012-2013 Heiko Strathmann
 */

#ifndef KERNEL_TWO_SAMPLE_TEST_H_
#define KERNEL_TWO_SAMPLE_TEST_H_

#include <shogun/lib/config.h>

#include <shogun/statistics/TwoSampleTest.h>
#include <shogun/kernel/Kernel.h>

namespace shogun
{

class CFeatures;
class CKernel;

class CKernelTwoSampleTest : public CTwoSampleTest
{
    public:
        CKernelTwoSampleTest();

        CKernelTwoSampleTest(CKernel* kernel, CFeatures* p_and_q,
                index_t q_start);

        CKernelTwoSampleTest(CKernel* kernel, CFeatures* p,
                CFeatures* q);

        virtual ~CKernelTwoSampleTest();

        inline virtual void set_kernel(CKernel* kernel)
        {
            /* ref before unref to prevent deleting in case objects are the same */
            SG_REF(kernel);
            SG_UNREF(m_kernel);
            m_kernel=kernel;
        }

        inline virtual CKernel* get_kernel()
        {
            SG_REF(m_kernel);
            return m_kernel;
        }

        virtual SGVector<float64_t> sample_null();

        virtual SGVector<float64_t> compute_statistic(
                bool multiple_kernels)=0;

        virtual float64_t compute_statistic()=0;

        virtual const char* get_name() const=0;

    private:
        void init();

    protected:
        CKernel* m_kernel;
};

}

#endif /* KERNEL_TWO_SAMPLE_TEST_H_ */