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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 MAT_INC
#define MAT_INC
#include "Object.h"
#include "Vec.h"
namespace Torch {
/** Matrix object.
@author Ronan Collobert (collober@iro.umontreal.ca)
*/
class Mat : public Object
{
public:
/** #false# if #ptr# is not allocated by Mat.
(With the first constructor)
*/
bool ptr_is_allocated;
/// Size of the matrix
int m, n;
/// Data of the matrix
real **ptr;
/** NULL if not allocated by Mat.
(when you're using the first constructor of Mat, or for
the matrix returned by subMat)
*/
real *base;
/** Create a matrix from values in #ptr_#.
(No memory copy).
*/
Mat(real ** ptr_, int n_rows, int n_cols);
/// Create a new matrix
Mat(int n_rows, int n_cols);
/// Copy the matrix #mat#
void copy(Mat * mat);
/// Zero the matrix
void zero();
/// Compute the norm1
real norm1();
/// Compute the Frobenius norm
real normFrobenius();
/// Compute the norm inf
real normInf();
/** Return the row #row# of the matrix.
If #vec# is NULL, return a new vector.
Else copy the row in #vec#.
*/
Vec *getRow(int row, Vec * vec = NULL);
/** Return the column #col# of the matrix.
If #vec# is NULL, return a new vector.
Else copy the column in #vec#.
*/
Vec *getCol(int col, Vec * vec = NULL);
/// Set the row #row# to values in #vec#
void setRow(int row, Vec * vec);
/// Set the column #col# to values in #vec#
void setCol(int row, Vec * vec);
/** Return a sub-matrix.
Note that the memory is shared with the original
matrix, so *be carefull*.
*/
Mat *subMat(int row1, int col1, int row2, int col2);
~Mat();
};
}
#endif
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