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// Copyright (C) 2003--2004 Ronan Collobert (collober@idiap.ch)
//
// This file is part of Torch 3.1.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef MAT_INC
#define MAT_INC
#include "Object.h"
#include "Vec.h"
namespace Torch {
/** Matrix object.
@author Ronan Collobert (collober@idiap.ch)
*/
class Mat : public Object
{
public:
/// 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 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*.
You have to destroy the returned matrix.
*/
Mat *subMat(int row1, int col1, int row2, int col2);
~Mat();
};
}
#endif
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