/usr/include/shogun/io/StreamingFileFromSimpleFeatures.h is in libshogun-dev 1.1.0-4ubuntu2.
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) 2011 Shashwat Lal Das
* Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
*/
#ifndef __STREAMING_FILEFROMSIMPLE_H__
#define __STREAMING_FILEFROMSIMPLE_H__
#include <shogun/io/StreamingFileFromFeatures.h>
#include <shogun/features/SimpleFeatures.h>
namespace shogun
{
/** @brief Class CStreamingFileFromSimpleFeatures is a derived
* class of CStreamingFile which creates an input source
* for the online framework from a CSimpleFeatures object.
*
* This kind of input is seekable, and hence can be used for
* making multiple passes over data.
*
* It is useful for testing/comparison purposes.
*/
template <class T> class CStreamingFileFromSimpleFeatures: public CStreamingFileFromFeatures
{
public:
/**
* Default constructor
*/
CStreamingFileFromSimpleFeatures();
/**
* Constructor taking a SimpleFeatures object as arg
*
* @param feat SimpleFeatures object
*/
CStreamingFileFromSimpleFeatures(CSimpleFeatures<T>* feat);
/**
* Constructor taking a SimpleFeatures object as arg
*
* @param feat SimpleFeatures object
* @param lab Labels as float64_t*
*/
CStreamingFileFromSimpleFeatures(CSimpleFeatures<T>* feat, float64_t* lab);
/**
* Destructor
*/
virtual ~CStreamingFileFromSimpleFeatures();
/**
* This function will be called for reading vectors from the
* corresponding SimpleFeatures object.
* It is specialized depending on class type T.
*
* @param vec vector
* @param len length of vector
*/
virtual void get_vector(T* &vec, int32_t &len);
/**
* This function will be called for reading vectors and labels
* from the corresponding SimpleFeatures object. It is
* specialized depending on class type T.
*
* @param vec vector
* @param len length of vector
* @param label label
*/
virtual void get_vector_and_label(T* &vec, int32_t &len, float64_t &label);
/**
* Reset the stream so the next example returned is the first
* example in the SimpleFeatures object.
*
*/
void reset_stream()
{
vector_num = 0;
}
/** @return object name */
inline virtual const char* get_name() const
{
return "StreamingFileFromSimpleFeatures";
}
private:
/**
* Initialize members to defaults
*/
void init();
protected:
/// SimpleFeatures object
CSimpleFeatures<T>* features;
/// Index of vector to be returned from the feature matrix
int32_t vector_num;
};
template <class T>
CStreamingFileFromSimpleFeatures<T>::CStreamingFileFromSimpleFeatures()
: CStreamingFileFromFeatures()
{
init();
}
template <class T>
CStreamingFileFromSimpleFeatures<T>::CStreamingFileFromSimpleFeatures(CSimpleFeatures<T>* feat)
: CStreamingFileFromFeatures()
{
ASSERT(feat);
features=feat;
init();
}
template <class T>
CStreamingFileFromSimpleFeatures<T>::CStreamingFileFromSimpleFeatures(CSimpleFeatures<T>* feat, float64_t* lab)
: CStreamingFileFromFeatures()
{
ASSERT(feat);
ASSERT(lab);
features=feat;
labels=lab;
init();
}
template <class T>
CStreamingFileFromSimpleFeatures<T>::~CStreamingFileFromSimpleFeatures()
{
}
template <class T>
void CStreamingFileFromSimpleFeatures<T>::init()
{
vector_num=0;
}
/* Functions to return the vector from the SimpleFeatures object
* If the class is of type T, specialize this function to work for
* vectors of that type. */
template <class T>
void CStreamingFileFromSimpleFeatures<T>::get_vector(T*& vector, int32_t& num_feat)
{
if (vector_num >= features->get_num_vectors())
{
vector=NULL;
num_feat=-1;
return;
}
SGVector<T> sg_vector=
features->get_feature_vector(vector_num);
vector = sg_vector.vector;
num_feat = sg_vector.vlen;;
vector_num++;
}
/* Functions to return the vector from the SimpleFeatures object with label */
template <class T>
void CStreamingFileFromSimpleFeatures<T>::get_vector_and_label
(T*& vector, int32_t& num_feat, float64_t& label)
{
if (vector_num >= features->get_num_vectors())
{
vector=NULL;
num_feat=-1;
return;
}
SGVector<T> sg_vector
=features->get_feature_vector(vector_num);
vector = sg_vector.vector;
num_feat = sg_vector.vlen;
label = labels[vector_num];
vector_num++;
}
}
#endif //__STREAMING_FILEFROMSIMPLE_H__
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