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Diffstat (limited to 'gsl-1.9/histogram/oper2d.c')
| -rw-r--r-- | gsl-1.9/histogram/oper2d.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/gsl-1.9/histogram/oper2d.c b/gsl-1.9/histogram/oper2d.c new file mode 100644 index 0000000..054f78f --- /dev/null +++ b/gsl-1.9/histogram/oper2d.c @@ -0,0 +1,203 @@ +/* gsl_histogram2d_oper.c + * Copyright (C) 2000 Simone Piccardi + * + * This library 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 library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ +/*************************************************************** + * + * File gsl_histogram2d_oper.c: + * Routine to make operation on 2D histograms. + * Need GSL library and header. + * Contains the routines: + * gsl_histogram2d_same_binning check if two histograms have the same binning + * gsl_histogram2d_add add two histogram + * gsl_histogram2d_sub subctract two histogram + * gsl_histogram2d_mult multiply two histogram + * gsl_histogram2d_div divide two histogram + * gsl_histogram2d_scale scale histogram contents + * + * Author: S. Piccardi + * Jan. 2000 + * + ***************************************************************/ +#include <config.h> +#include <stdlib.h> +#include <gsl/gsl_errno.h> +#include <gsl/gsl_histogram2d.h> + +/* + * gsl_histogram2d_same_binning: + * control if two histogram have the + * same binning + */ +int +gsl_histogram2d_equal_bins_p (const gsl_histogram2d * h1, + const gsl_histogram2d * h2) +{ + + if ((h1->nx != h2->nx) || (h1->ny != h2->ny)) + { + return 0; + } + { + size_t i; + /* init ranges */ + for (i = 0; i <= (h1->nx); i++) + { + if (h1->xrange[i] != h2->xrange[i]) + { + return 0; + } + } + for (i = 0; i <= (h1->ny); i++) + { + if (h1->yrange[i] != h2->yrange[i]) + { + return 0; + } + } + } + return 1; +} + +/* + * gsl_histogram2d_add: + * add two histogram + */ + +int +gsl_histogram2d_add (gsl_histogram2d * h1, const gsl_histogram2d * h2) +{ + size_t i; + + if (!gsl_histogram2d_equal_bins_p (h1, h2)) + { + GSL_ERROR ("histograms have different binning", GSL_EINVAL); + } + + for (i = 0; i < (h1->nx) * (h1->ny); i++) + { + h1->bin[i] += h2->bin[i]; + } + + return GSL_SUCCESS; +} + +/* + * gsl_histogram2d_sub: + * subtract two histogram + */ + +int +gsl_histogram2d_sub (gsl_histogram2d * h1, const gsl_histogram2d * h2) +{ + size_t i; + + if (!gsl_histogram2d_equal_bins_p (h1, h2)) + { + GSL_ERROR ("histograms have different binning", GSL_EINVAL); + } + + for (i = 0; i < (h1->nx) * (h1->ny); i++) + { + h1->bin[i] -= h2->bin[i]; + } + + return GSL_SUCCESS; +} + +/* + * gsl_histogram2d_mult: + * multiply two histogram + */ + +int +gsl_histogram2d_mul (gsl_histogram2d * h1, const gsl_histogram2d * h2) +{ + size_t i; + + if (!gsl_histogram2d_equal_bins_p (h1, h2)) + { + GSL_ERROR ("histograms have different binning", GSL_EINVAL); + } + + for (i = 0; i < (h1->nx) * (h1->ny); i++) + { + h1->bin[i] *= h2->bin[i]; + } + + return GSL_SUCCESS; +} + +/* + * gsl_histogram2d_div: + * divide two histogram + */ + +int +gsl_histogram2d_div (gsl_histogram2d * h1, const gsl_histogram2d * h2) +{ + size_t i; + + if (!gsl_histogram2d_equal_bins_p (h1, h2)) + { + GSL_ERROR ("histograms have different binning", GSL_EINVAL); + } + + for (i = 0; i < (h1->nx) * (h1->ny); i++) + { + h1->bin[i] /= h2->bin[i]; + } + + return GSL_SUCCESS; +} + +/* + * gsl_histogram2d_scale: + * scale a histogram by a numeric factor + */ + +int +gsl_histogram2d_scale (gsl_histogram2d * h, double scale) +{ + size_t i; + + for (i = 0; i < (h->nx) * (h->ny); i++) + { + h->bin[i] *= scale; + } + + return GSL_SUCCESS; +} + +/* + * gsl_histogram2d_shift: + * shift a histogram by a numeric offset + */ + +int +gsl_histogram2d_shift (gsl_histogram2d * h, double shift) +{ + size_t i; + + for (i = 0; i < (h->nx) * (h->ny); i++) + { + h->bin[i] += shift; + } + + return GSL_SUCCESS; +} + |