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// Copyright (C) 2002 Ronan Collobert (collober@iro.umontreal.ca)
//
//
// This file is part of Torch. Release II.
// [The Ultimate Machine Learning Library]
//
// Torch 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 2 of the License, or
// (at your option) any later version.
//
// Torch is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Torch; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "SparseDataSet.h"
namespace Torch {
SparseDataSet::SparseDataSet()
{
}
void SparseDataSet::init()
{
DataSet::init();
addToList(&inputs, n_inputs, NULL);
}
void SparseDataSet::setInputs(sreal **all_inputs_, int n_inputs_, int n_examples_)
{
if(is_already_initialized)
error("SparseDataSet: please, call setInputs *before* initialization");
all_inputs = all_inputs_;
n_inputs = n_inputs_;
n_real_examples = n_examples_;
}
void SparseDataSet::setTargets(real **all_targets_, int n_targets_)
{
if(is_already_initialized)
error("SparseDataSet: please, call setTargets *before* initialization");
all_targets = all_targets_;
n_targets = n_targets_;
}
void SparseDataSet::setRealExample(int t)
{
current_example = t;
if(n_targets > 0)
targets = all_targets[t];
if(n_inputs > 0)
inputs->ptr = all_inputs[t];
}
real SparseDataSet::realRealDotProduct(int i, int j)
{
real z = 0;
sreal *xx = all_inputs[i];
sreal *yy = all_inputs[j];
while( (xx->index != -1) && (yy->index != -1) )
{
if(xx->index == yy->index)
{
z += xx->value * yy->value;
xx++;
yy++;
}
else
{
if(xx->index > yy->index)
yy++;
else
xx++;
}
}
return(z);
}
real SparseDataSet::realDotProduct(int i, List *y)
{
real z = 0;
sreal *xx = all_inputs[i];
sreal *yy = (sreal *)y->ptr;
while( (xx->index != -1) && (yy->index != -1) )
{
if(xx->index == yy->index)
{
z += xx->value * yy->value;
xx++;
yy++;
}
else
{
if(xx->index > yy->index)
yy++;
else
xx++;
}
}
return(z);
}
real SparseDataSet::dotProduct(List *x, List *y)
{
real z = 0;
sreal *xx = (sreal *)x->ptr;
sreal *yy = (sreal *)y->ptr;
while( (xx->index != -1) && (yy->index != -1) )
{
if(xx->index == yy->index)
{
z += xx->value * yy->value;
xx++;
yy++;
}
else
{
if(xx->index > yy->index)
yy++;
else
xx++;
}
}
return(z);
}
SparseDataSet::~SparseDataSet()
{
freeList(&inputs);
}
}
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