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/* 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;
}
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