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- /* gsl_histogram2d_maxval.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 3 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_maxval.c:
- * Routine to find maximum and minumum content of a 2D hisogram.
- * Need GSL library and header.
- * Contains the routines:
- * gsl_histogram2d_max_val find max content values
- * gsl_histogram2d_min_val find min content values
- * gsl_histogram2d_bin_max find coordinates of max contents bin
- * gsl_histogram2d_bin_min find coordinates of min contents bin
- *
- * Author: S. Piccardi
- * Jan. 2000
- *
- ***************************************************************/
- #include "gsl__config.h"
- #include "gsl_errno.h"
- #include "gsl_histogram2d.h"
- /*
- * Return the maximum contents value of a 2D histogram
- */
- double
- gsl_histogram2d_max_val (const gsl_histogram2d * h)
- {
- const size_t nx = h->nx;
- const size_t ny = h->ny;
- size_t i;
- double max = h->bin[0 * ny + 0];
- for (i = 0; i < nx * ny; i++)
- {
- if (h->bin[i] > max)
- {
- max = h->bin[i];
- }
- }
- return max;
- }
- /*
- * Find the bin index for maximum value of a 2D histogram
- */
- void
- gsl_histogram2d_max_bin (const gsl_histogram2d * h, size_t * imax_out, size_t * jmax_out)
- {
- const size_t nx = h->nx;
- const size_t ny = h->ny;
- size_t imax = 0, jmax = 0, i, j;
- double max = h->bin[0 * ny + 0];
- for (i = 0; i < nx; i++)
- {
- for (j = 0; j < ny; j++)
- {
- double x = h->bin[i * ny + j];
- if (x > max)
- {
- max = x;
- imax = i;
- jmax = j;
- }
- }
- }
- *imax_out = imax;
- *jmax_out = jmax;
- }
- /*
- * Return the minimum contents value of a 2D histogram
- */
- double
- gsl_histogram2d_min_val (const gsl_histogram2d * h)
- {
- const size_t nx = h->nx;
- const size_t ny = h->ny;
- size_t i;
- double min = h->bin[0 * ny + 0];
- for (i = 0; i < nx * ny; i++)
- {
- if (h->bin[i] < min)
- {
- min = h->bin[i];
- }
- }
- return min;
- }
- /*
- * Find the bin index for minimum value of a 2D histogram
- */
- void
- gsl_histogram2d_min_bin (const gsl_histogram2d * h, size_t * imin_out, size_t * jmin_out)
- {
- const size_t nx = h->nx;
- const size_t ny = h->ny;
- size_t imin = 0, jmin = 0, i, j;
- double min = h->bin[0 * ny + 0];
- for (i = 0; i < nx; i++)
- {
- for (j = 0; j < ny; j++)
- {
- double x = h->bin[i * ny + j];
- if (x < min)
- {
- min = x;
- imin = i;
- jmin = j;
- }
- }
- }
- *imin_out = imin;
- *jmin_out = jmin;
- }
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