/usr/include/shogun/multiclass/ecoc/ECOCUtil.h is in libshogun-dev 3.2.0-7.3build4.
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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 | /*
* 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 Chiyuan Zhang
* Copyright (C) 2012 Chiyuan Zhang
*/
#ifndef ECOCUTIL_H__
#define ECOCUTIL_H__
#include <shogun/mathematics/Math.h>
namespace shogun
{
/** A helper class for some ECOC related procedures. */
class CECOCUtil
{
public:
/** compute hamming distance.
*
* code elements can be -1, +1 or 0, when 0 occurs, that position of code
* is not counted in the distance.
*/
template<typename T1, typename T2>
static int32_t hamming_distance(T1 *c1, T2 *c2, int32_t len)
{
int32_t dist = 0;
for (int32_t i=0; i < len; ++i)
dist += static_cast<int32_t>(CMath::abs((c1[i]-c2[i])));
return dist/2;
}
};
} /* shogun */
#endif /* end of include guard: ECOCUTIL_H__ */
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