/usr/include/shogun/statistics/MMDKernelSelection.h is in libshogun-dev 3.1.1-1.
This file is owned by root:root, with mode 0o644.
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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 __MMDKERNELSELECTION_H_
#define __MMDKERNELSELECTION_H_
#include <shogun/base/SGObject.h>
namespace shogun
{
class CKernelTwoSampleTestStatistic;
class CKernel;
/** @brief Base class for kernel selection for MMD-based two-sample test
* statistic implementations (e.g. MMD).
* Provides abstract methods for selecting kernels and computing criteria or
* kernel weights for the implemented method. In order to implement new methods
* for kernel selection, simply write a new implementation of this class.
*
* Kernel selection works this way: One passes an instance of CCombinedKernel
* to the MMD statistic and appends all kernels that should be considered.
* Depending on the type of kernel selection implementation, a single one or
* a combination of those baseline kernels is selected and returned to the user.
* This kernel can then be passed to the MMD instance to perform a test.
*
*/
class CMMDKernelSelection: public CSGObject
{
public:
/** Default constructor */
CMMDKernelSelection();
/** Constructor that initialises the underlying MMD instance
*
* @param mmd MMD instance to use. Has to be an MMD based kernel two-sample
* test. Currently: linear or quadratic time MMD.
*/
CMMDKernelSelection(CKernelTwoSampleTestStatistic* mmd);
/** Destructor */
virtual ~CMMDKernelSelection();
/** If the the implemented method selects a single kernel, this computes
* criteria for all underlying kernels. If the method selects combined
* kernels, this method returns weights for the baseline kernels
*
* @return vector with criteria or kernel weights
*/
virtual SGVector<float64_t> compute_measures()=0;
/** Performs kernel selection on the base of the compute_measures() method
* and returns the selected kernel which is either a single or a combined
* one (with weights set)
*
* @return selected kernel (SG_REF'ed)
*/
virtual CKernel* select_kernel();
/** @return name of the SGSerializable */
const char* get_name() const=0;
private:
/** Initializer */
void init();
protected:
/** Underlying MMD instance */
CKernelTwoSampleTestStatistic* m_mmd;
};
}
#endif /* __MMDKERNELSELECTION_H_ */
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