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/* matrix/oper_source.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000 Brian Gough
*
* 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 2 of the License, or (at
* your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
int
FUNCTION(gsl_matrix, add) (TYPE(gsl_matrix) * a, const TYPE(gsl_matrix) * b)
{
const size_t M = a->size1;
const size_t N = a->size2;
if (b->size1 != M || b->size2 != N)
{
GSL_ERROR ("matrices must have same dimensions", GSL_EBADLEN);
}
else
{
const size_t tda_a = a->tda;
const size_t tda_b = b->tda;
size_t i, j;
for (i = 0; i < M; i++)
{
for (j = 0; j < N; j++)
{
a->data[i * tda_a + j] += b->data[i * tda_b + j];
}
}
return GSL_SUCCESS;
}
}
int
FUNCTION(gsl_matrix, sub) (TYPE(gsl_matrix) * a, const TYPE(gsl_matrix) * b)
{
const size_t M = a->size1;
const size_t N = a->size2;
if (b->size1 != M || b->size2 != N)
{
GSL_ERROR ("matrices must have same dimensions", GSL_EBADLEN);
}
else
{
const size_t tda_a = a->tda;
const size_t tda_b = b->tda;
size_t i, j;
for (i = 0; i < M; i++)
{
for (j = 0; j < N; j++)
{
a->data[i * tda_a + j] -= b->data[i * tda_b + j];
}
}
return GSL_SUCCESS;
}
}
int
FUNCTION(gsl_matrix, mul_elements) (TYPE(gsl_matrix) * a, const TYPE(gsl_matrix) * b)
{
const size_t M = a->size1;
const size_t N = a->size2;
if (b->size1 != M || b->size2 != N)
{
GSL_ERROR ("matrices must have same dimensions", GSL_EBADLEN);
}
else
{
const size_t tda_a = a->tda;
const size_t tda_b = b->tda;
size_t i, j;
for (i = 0; i < M; i++)
{
for (j = 0; j < N; j++)
{
a->data[i * tda_a + j] *= b->data[i * tda_b + j];
}
}
return GSL_SUCCESS;
}
}
int
FUNCTION(gsl_matrix, div_elements) (TYPE(gsl_matrix) * a, const TYPE(gsl_matrix) * b)
{
const size_t M = a->size1;
const size_t N = a->size2;
if (b->size1 != M || b->size2 != N)
{
GSL_ERROR ("matrices must have same dimensions", GSL_EBADLEN);
}
else
{
const size_t tda_a = a->tda;
const size_t tda_b = b->tda;
size_t i, j;
for (i = 0; i < M; i++)
{
for (j = 0; j < N; j++)
{
a->data[i * tda_a + j] /= b->data[i * tda_b + j];
}
}
return GSL_SUCCESS;
}
}
int
FUNCTION(gsl_matrix, scale) (TYPE(gsl_matrix) * a, const double x)
{
const size_t M = a->size1;
const size_t N = a->size2;
const size_t tda = a->tda;
size_t i, j;
for (i = 0; i < M; i++)
{
for (j = 0; j < N; j++)
{
a->data[i * tda + j] *= x;
}
}
return GSL_SUCCESS;
}
int
FUNCTION(gsl_matrix, add_constant) (TYPE(gsl_matrix) * a, const double x)
{
const size_t M = a->size1;
const size_t N = a->size2;
const size_t tda = a->tda;
size_t i, j;
for (i = 0; i < M; i++)
{
for (j = 0; j < N; j++)
{
a->data[i * tda + j] += x;
}
}
return GSL_SUCCESS;
}
int
FUNCTION(gsl_matrix, add_diagonal) (TYPE(gsl_matrix) * a, const double x)
{
const size_t M = a->size1;
const size_t N = a->size2;
const size_t tda = a->tda;
const size_t loop_lim = ( M < N ? M : N );
size_t i;
for (i = 0; i < loop_lim; i++)
{
a->data[i * tda + i] += x;
}
return GSL_SUCCESS;
}
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