/usr/include/shogun/distance/RealDistance.h is in libshogun-dev 1.1.0-4ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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
*/
#ifndef _REALDISTANCE_H__
#define _REALDISTANCE_H__
#include <shogun/distance/SimpleDistance.h>
#include <shogun/lib/common.h>
namespace shogun
{
/** @brief class RealDistance */
class CRealDistance : public CSimpleDistance<float64_t>
{
public:
/** default constructor */
CRealDistance() : CSimpleDistance<float64_t>() {}
/** init distance
*
* @param l features of left-hand side
* @param r features of right-hand side
* @return if init was successful
*/
virtual bool init(CFeatures* l, CFeatures* r)
{
CSimpleDistance<float64_t>::init(l,r);
ASSERT(l->get_feature_type()==F_DREAL);
ASSERT(r->get_feature_type()==F_DREAL);
return true;
}
/** get feature type the distance can deal with
*
* @return feature type DREAL
*/
inline virtual EFeatureType get_feature_type() { return F_DREAL; }
/** Returns the name of the SGSerializable instance. It MUST BE
* the CLASS NAME without the prefixed `C'.
*
* @return name of the SGSerializable
*/
virtual const char* get_name() const { return "RealDistance"; }
/** cleanup distance
*
* abstract base method
*/
virtual void cleanup()=0;
/** get distance type we are
*
* abstrace base method
*
* @return distance type
*/
virtual EDistanceType get_distance_type()=0 ;
protected:
/// compute distance function for features a and b
/// idx_{a,b} denote the index of the feature vectors
/// in the corresponding feature object
virtual float64_t compute(int32_t x, int32_t y)=0;
};
} // namespace shogun
#endif
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