StreamingDotFeatures.cpp

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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
 */
#include <shogun/features/streaming/StreamingDotFeatures.h>

using namespace shogun;

CStreamingDotFeatures::CStreamingDotFeatures() : CStreamingFeatures()
{
    set_property(FP_STREAMING_DOT);
}

CStreamingDotFeatures::CStreamingDotFeatures(CDotFeatures* dot_features,
        float64_t* lab)
{
    SG_NOTIMPLEMENTED;
    return;
}

CStreamingDotFeatures::~CStreamingDotFeatures()
{
}

void CStreamingDotFeatures::dense_dot_range(float32_t* output, float32_t* alphas,
        float32_t* vec, int32_t dim, float32_t b, int32_t num_vec)
{
    ASSERT(num_vec>=0);

    int32_t counter=0;
    start_parser();
    while (get_next_example())
    {
        if (alphas)
            output[counter]=alphas[counter]*dense_dot(vec, dim)+b;
        else
            output[counter]=dense_dot(vec, dim)+b;

        release_example();

        counter++;
        if ((counter>=num_vec) && (num_vec>0))
            break;
    }
    end_parser();
}

void CStreamingDotFeatures::expand_if_required(float32_t*& vec, int32_t &len)
{
    int32_t dim = get_dim_feature_space();
    if (dim > len)
    {
        vec = SG_REALLOC(float32_t, vec, dim);
        memset(&vec[len], 0, (dim-len) * sizeof(float32_t));
        len = dim;
    }
}

void CStreamingDotFeatures::expand_if_required(float64_t*& vec, int32_t &len)
{
    int32_t dim = get_dim_feature_space();
    if (dim > len)
    {
        vec = SG_REALLOC(float64_t, vec, dim);
        memset(&vec[len], 0, (dim-len) * sizeof(float64_t));
        len = dim;
    }
}

void* CStreamingDotFeatures::get_feature_iterator()
{
    SG_NOTIMPLEMENTED;
    return NULL;
}

int32_t CStreamingDotFeatures::get_nnz_features_for_vector()
{
    SG_NOTIMPLEMENTED;
    return -1;
}

bool CStreamingDotFeatures::get_next_feature(int32_t& index, float32_t& value, void* iterator)
{
    SG_NOTIMPLEMENTED;
    return false;
}

void CStreamingDotFeatures::free_feature_iterator(void* iterator)
{
    SG_NOTIMPLEMENTED;
    return;
}