/usr/include/shogun/kernel/ConstKernel.h is in libshogun-dev 3.2.0-7.3build4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | /*
* 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
*/
#ifndef _CONSTKERNEL_H___
#define _CONSTKERNEL_H___
#include <shogun/mathematics/Math.h>
#include <shogun/lib/common.h>
#include <shogun/kernel/Kernel.h>
#include <shogun/features/Features.h>
namespace shogun
{
/** @brief The Constant Kernel returns a constant for all elements.
*
* A ``kernel'' that simply returns a single constant, i.e.
* \f$k({\bf x}, {\bf x'})= c\f$
*
*/
class CConstKernel: public CKernel
{
public:
/** default constructor */
CConstKernel();
/** constructor
*
* @param c constant c
*/
CConstKernel(float64_t c);
/** constructor
*
* @param l features of left-hand side
* @param r features of right-hand side
* @param c constant c
*/
CConstKernel(CFeatures* l, CFeatures *r, float64_t c);
virtual ~CConstKernel();
/** initialize kernel
*
* @param l features of left-hand side
* @param r features of right-hand side
* @return if initializing was successful
*/
virtual bool init(CFeatures* l, CFeatures* r);
/** return what type of kernel we are
*
* @return kernel type CONST
*/
virtual EKernelType get_kernel_type() { return K_CONST; }
/** return feature type the kernel can deal with
*
* @return feature type ANY
*/
virtual EFeatureType get_feature_type()
{
return F_ANY;
}
/** return feature class the kernel can deal with
*
* @return feature class ANY
*/
virtual EFeatureClass get_feature_class()
{
return C_ANY;
}
/** return the kernel's name
*
* @return name Const
*/
virtual const char* get_name() const { return "ConstKernel"; }
protected:
/** compute kernel function for features a and b
*
* @param row dummy row
* @param col dummy col
* @return computed kernel function (const value)
*/
virtual float64_t compute(int32_t row, int32_t col)
{
return const_value;
}
private:
void init();
protected:
/** const value */
float64_t const_value;
};
}
#endif /* _CONSTKERNEL_H__ */
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