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- /* gsl_histogram2d_calloc_range.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_calloc_range.c:
- * Routine to create a variable binning 2D histogram providing
- * the input range vectors. Need GSL library and header.
- * Do range check and allocate the histogram data.
- *
- * Author: S. Piccardi
- * Jan. 2000
- *
- ***************************************************************/
- #include <config.h>
- #include <stdlib.h>
- #include <gsl/gsl_errno.h>
- #include <gsl/gsl_histogram2d.h>
- /*
- * Routine that create a 2D histogram using the given
- * values for X and Y ranges
- */
- gsl_histogram2d *
- gsl_histogram2d_calloc_range (size_t nx, size_t ny,
- double *xrange,
- double *yrange)
- {
- size_t i, j;
- gsl_histogram2d *h;
-
- /* check arguments */
-
- if (nx == 0)
- {
- GSL_ERROR_VAL ("histogram length nx must be positive integer",
- GSL_EDOM, 0);
- }
-
- if (ny == 0)
- {
- GSL_ERROR_VAL ("histogram length ny must be positive integer",
- GSL_EDOM, 0);
- }
-
- /* init ranges */
-
- for (i = 0; i < nx; i++)
- {
- if (xrange[i] >= xrange[i + 1])
- {
- GSL_ERROR_VAL ("histogram xrange not in increasing order",
- GSL_EDOM, 0);
- }
- }
-
- for (j = 0; j < ny; j++)
- {
- if (yrange[j] >= yrange[j + 1])
- {
- GSL_ERROR_VAL ("histogram yrange not in increasing order"
- ,GSL_EDOM, 0);
- }
- }
-
- /* Allocate histogram */
-
- h = (gsl_histogram2d *) malloc (sizeof (gsl_histogram2d));
-
- if (h == 0)
- {
- GSL_ERROR_VAL ("failed to allocate space for histogram struct",
- GSL_ENOMEM, 0);
- }
-
- h->xrange = (double *) malloc ((nx + 1) * sizeof (double));
-
- if (h->xrange == 0)
- {
- /* exception in constructor, avoid memory leak */
- free (h);
-
- GSL_ERROR_VAL ("failed to allocate space for histogram xrange",
- GSL_ENOMEM, 0);
- }
-
- h->yrange = (double *) malloc ((ny + 1) * sizeof (double));
-
- if (h->yrange == 0)
- {
- /* exception in constructor, avoid memory leak */
- free (h);
-
- GSL_ERROR_VAL ("failed to allocate space for histogram yrange",
- GSL_ENOMEM, 0);
- }
-
- h->bin = (double *) malloc (nx * ny * sizeof (double));
-
- if (h->bin == 0)
- {
- /* exception in constructor, avoid memory leak */
- free (h->xrange);
- free (h->yrange);
- free (h);
-
- GSL_ERROR_VAL ("failed to allocate space for histogram bins",
- GSL_ENOMEM, 0);
- }
-
- /* init histogram */
-
- /* init ranges */
-
- for (i = 0; i <= nx; i++)
- {
- h->xrange[i] = xrange[i];
- }
-
- for (j = 0; j <= ny; j++)
- {
- h->yrange[j] = yrange[j];
- }
-
- /* clear contents */
-
- for (i = 0; i < nx; i++)
- {
- for (j = 0; j < ny; j++)
- {
- h->bin[i * ny + j] = 0;
- }
- }
-
- h->nx = nx;
- h->ny = ny;
-
- return h;
- }
-