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/* gsl_histogram2d_calloc_range.c
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* Copyright (C) 2000 Simone Piccardi
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this library; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/***************************************************************
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*
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* File gsl_histogram2d_calloc_range.c:
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* Routine to create a variable binning 2D histogram providing
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* the input range vectors. Need GSL library and header.
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* Do range check and allocate the histogram data.
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*
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* Author: S. Piccardi
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* Jan. 2000
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*
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***************************************************************/
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#include <config.h>
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#include <stdlib.h>
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#include <gsl/gsl_errno.h>
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#include <gsl/gsl_histogram2d.h>
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/*
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* Routine that create a 2D histogram using the given
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* values for X and Y ranges
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*/
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gsl_histogram2d *
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gsl_histogram2d_calloc_range (size_t nx, size_t ny,
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double *xrange,
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double *yrange)
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{
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size_t i, j;
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gsl_histogram2d *h;
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/* check arguments */
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if (nx == 0)
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{
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GSL_ERROR_VAL ("histogram length nx must be positive integer",
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GSL_EDOM, 0);
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}
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if (ny == 0)
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{
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GSL_ERROR_VAL ("histogram length ny must be positive integer",
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GSL_EDOM, 0);
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}
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/* init ranges */
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for (i = 0; i < nx; i++)
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{
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if (xrange[i] >= xrange[i + 1])
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{
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GSL_ERROR_VAL ("histogram xrange not in increasing order",
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GSL_EDOM, 0);
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}
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}
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for (j = 0; j < ny; j++)
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{
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if (yrange[j] >= yrange[j + 1])
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{
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GSL_ERROR_VAL ("histogram yrange not in increasing order"
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,GSL_EDOM, 0);
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}
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}
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/* Allocate histogram */
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h = (gsl_histogram2d *) malloc (sizeof (gsl_histogram2d));
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if (h == 0)
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{
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GSL_ERROR_VAL ("failed to allocate space for histogram struct",
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GSL_ENOMEM, 0);
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}
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h->xrange = (double *) malloc ((nx + 1) * sizeof (double));
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if (h->xrange == 0)
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{
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/* exception in constructor, avoid memory leak */
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free (h);
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GSL_ERROR_VAL ("failed to allocate space for histogram xrange",
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GSL_ENOMEM, 0);
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}
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h->yrange = (double *) malloc ((ny + 1) * sizeof (double));
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if (h->yrange == 0)
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{
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/* exception in constructor, avoid memory leak */
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free (h);
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GSL_ERROR_VAL ("failed to allocate space for histogram yrange",
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GSL_ENOMEM, 0);
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}
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h->bin = (double *) malloc (nx * ny * sizeof (double));
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if (h->bin == 0)
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{
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/* exception in constructor, avoid memory leak */
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free (h->xrange);
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free (h->yrange);
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free (h);
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GSL_ERROR_VAL ("failed to allocate space for histogram bins",
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GSL_ENOMEM, 0);
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}
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/* init histogram */
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/* init ranges */
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for (i = 0; i <= nx; i++)
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{
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h->xrange[i] = xrange[i];
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}
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for (j = 0; j <= ny; j++)
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{
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h->yrange[j] = yrange[j];
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}
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/* clear contents */
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for (i = 0; i < nx; i++)
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{
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for (j = 0; j < ny; j++)
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{
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h->bin[i * ny + j] = 0;
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}
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}
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h->nx = nx;
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h->ny = ny;
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return h;
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}
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