| /* 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 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_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 <config.h> |
| #include <gsl/gsl_errno.h> |
| #include <gsl/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; |
| } |
| |