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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
#ifndef DATA_SET_INC
#define DATA_SET_INC
#include "Measurer.h"
#include "List.h"
namespace Torch {
/** Provides an interface to manipulate all kind of data.
@author Ronan Collobert (collober@iro.umontreal.ca)
*/
class DataSet : public Object
{
public:
//--- internal ---
int **subsets;
int *n_examples_subsets;
int n_subsets;
//----------------
// True if a subset of the examples is selected.
bool select_examples;
/** The indices of all selected examples.
When #select_examples# is false, it contains
the indices of all examples.
*/
int *selected_examples;
/** Index of the current example.
Warning:
\begin{itemize}
\item don't forget to set it in #setRealExample()# !
\item it's the \emph{real} index and not the index
in the #selected_examples# table.
\end{itemize}
*/
int current_example;
/// Targets size, for all examples.
int n_targets;
/// Pointer to the targets of the current example.
void *targets;
/// Input size, for all examples.
int n_inputs;
/// Pointer on the inputs of the current example.
List *inputs;
/** Number of examples in the dataset.
If you're using #select_examples#, it's
the number of selected examples.
*/
int n_examples;
/** Real number of examples in the dataset.
It's the number of examples in memory.
(= #n_examples# if #select_examples# is false)
*/
int n_real_examples;
//-----
///
DataSet();
/** Set #targets# and #inputs# to the targets and inputs
of the example with the index #selected_examples[t]#.
*/
void setExample(int t);
/** Set #targets# and #inputs# to the targets and inputs
of the example with the index #t#.
*/
virtual void setRealExample(int t) = 0;
/** Set a new subset.
\begin{itemize}
\item #subset_# (of size #n_examples_#) is a set
of indices which define a subset of #data#.
\item if a #pushSubset()# has been already called,
the next #pushSubset()# defines a subset of the
previous subset, and so on...
\item this function set #select_examples# to #true#
and set the read indices of the examples in
#selected_examples#.
\end{itemize}
*/
void pushSubset(int *subset_, int n_examples_);
/** Remove the last subset.
\begin{itemize}
\item recomputes "selected_examples".
\item if it was the last subset, set #select_examples#
to #false#.
\end{itemize}
*/
void popSubset();
//-----
virtual void init();
virtual void reset();
virtual ~DataSet();
};
}
#endif
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