| /* 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; |
| } |