diff options
Diffstat (limited to 'gsl-1.9/histogram/add2d.c')
-rw-r--r-- | gsl-1.9/histogram/add2d.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/gsl-1.9/histogram/add2d.c b/gsl-1.9/histogram/add2d.c new file mode 100644 index 0000000..066119d --- /dev/null +++ b/gsl-1.9/histogram/add2d.c @@ -0,0 +1,66 @@ +/* histogram/add2d.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. + */ + +#include <config.h> +#include <stdlib.h> +#include <gsl/gsl_errno.h> +#include <gsl/gsl_histogram.h> +#include <gsl/gsl_histogram2d.h> + +#include "find2d.c" + +int +gsl_histogram2d_increment (gsl_histogram2d * h, double x, double y) +{ + int status = gsl_histogram2d_accumulate (h, x, y, 1.0); + return status; +} + +int +gsl_histogram2d_accumulate (gsl_histogram2d * h, + double x, double y, double weight) +{ + const size_t nx = h->nx; + const size_t ny = h->ny; + + size_t i = 0, j = 0; + + int status = find2d (h->nx, h->xrange, h->ny, h->yrange, x, y, &i, &j); + + if (status) + { + return GSL_EDOM; + } + + if (i >= nx) + { + GSL_ERROR ("index lies outside valid range of 0 .. nx - 1", + GSL_ESANITY); + } + + if (j >= ny) + { + GSL_ERROR ("index lies outside valid range of 0 .. ny - 1", + GSL_ESANITY); + } + + h->bin[i * ny + j] += weight; + + return GSL_SUCCESS; +} |