text: /* histogram/test.c
   * 
   * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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 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 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 <stdio.h>
  #include <gsl/gsl_histogram.h>
  #include <gsl/gsl_test.h>
  #include <gsl/gsl_ieee_utils.h>
  
  #define N 397
  #define NR 10
  
  void
  test1d (void)
  {
    double xr[NR + 1] =
    {0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0};
  
    gsl_histogram *h, *h1, *hr, *g;
    size_t i, j;
  
    gsl_ieee_env_setup ();
  
    h = gsl_histogram_calloc (N);
    h1 = gsl_histogram_calloc (N);
    g = gsl_histogram_calloc (N);
  
    gsl_test (h->range == 0, "gsl_histogram_alloc returns valid range pointer");
    gsl_test (h->bin == 0, "gsl_histogram_alloc returns valid bin pointer");
    gsl_test (h->n != N, "gsl_histogram_alloc returns valid size");
  
  
    hr = gsl_histogram_calloc_range (NR, xr);
  
    gsl_test (hr->range == 0, "gsl_histogram_calloc_range returns valid range pointer");
    gsl_test (hr->bin == 0, "gsl_histogram_calloc_range returns valid bin pointer");
    gsl_test (hr->n != NR, "gsl_histogram_calloc_range returns valid size");
  
    {
      int status = 0;
      for (i = 0; i <= NR; i++)
        {
          if (hr->range[i] != xr[i])
            {
              status = 1;
            }
        };
  
      gsl_test (status, "gsl_histogram_calloc_range creates range");
    }
  
    for (i = 0; i <= NR; i++)
      {
        hr->range[i] = 0.0;
      }
  
    {
      int status = gsl_histogram_set_ranges (hr, xr, NR+1);
  
      for (i = 0; i <= NR; i++)
        {
          if (hr->range[i] != xr[i])
            {
              status = 1;
            }
        };
  
      gsl_test (status, "gsl_histogram_set_range sets range");
    }
      
  
    for (i = 0; i < N; i++)
      {
        gsl_histogram_accumulate (h, (double) i, (double) i);
      };
  
    {
      int status = 0;
  
      for (i = 0; i < N; i++)
        {
          if (h->bin[i] != (double) i)
            {
              status = 1;
            }
        };
  
      gsl_test (status, "gsl_histogram_accumulate writes into array");
    }
  
  
    {
      int status = 0;
  
      for (i = 0; i < N; i++)
        {
          if (gsl_histogram_get (h, i) != i)
            status = 1;
        };
      gsl_test (status, "gsl_histogram_get reads from array");
    }
  
    for (i = 0; i <= N; i++)
      {
        h1->range[i] = 100.0 + i;
      }
  
    gsl_histogram_memcpy (h1, h);
  
    {
      int status = 0;
      for (i = 0; i <= N; i++)
        {
          if (h1->range[i] != h->range[i])
            status = 1;
        };
      gsl_test (status, "gsl_histogram_memcpy copies bin ranges");
    }
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (gsl_histogram_get (h1, i) != gsl_histogram_get (h, i))
            status = 1;
        };
      gsl_test (status, "gsl_histogram_memcpy copies bin values");
    }
  
    gsl_histogram_free (h1);
  
    h1 = gsl_histogram_clone (h);
  
    {
      int status = 0;
      for (i = 0; i <= N; i++)
        {
          if (h1->range[i] != h->range[i])
            status = 1;
        };
      gsl_test (status, "gsl_histogram_clone copies bin ranges");
    }
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (gsl_histogram_get (h1, i) != gsl_histogram_get (h, i))
            status = 1;
        };
      gsl_test (status, "gsl_histogram_clone copies bin values");
    }
  
    gsl_histogram_reset (h);
  
    {
      int status = 0;
  
      for (i = 0; i < N; i++)
        {
          if (h->bin[i] != 0)
            status = 1;
        }
      gsl_test (status, "gsl_histogram_reset zeros array");
    }
  
  
    {
      int status = 0;
  
      for (i = 0; i < N; i++)
        {
          gsl_histogram_increment (h, (double) i);
  
          for (j = 0; j <= i; j++)
            {
              if (h->bin[j] != 1)
                {
                  status = 1;
                }
            }
  
          for (j = i + 1; j < N; j++)
            {
              if (h->bin[j] != 0)
                {
                  status = 1;
                }
            }
        }
  
      gsl_test (status, "gsl_histogram_increment increases bin value");
    }
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          double x0 = 0, x1 = 0;
  
          gsl_histogram_get_range (h, i, &x0, &x1);
  
          if (x0 != i || x1 != i + 1)
            {
              status = 1;
            }
        }
      gsl_test (status, "gsl_histogram_getbinrange returns bin range");
    }
  
    {
      int status = 0;
      if (gsl_histogram_max (h) != N)
        status = 1;
      gsl_test (status, "gsl_histogram_max returns maximum");
    }
  
    {
      int status = 0;
      if (gsl_histogram_min (h) != 0)
        status = 1;
      gsl_test (status, "gsl_histogram_min returns minimum");
    }
  
    {
      int status = 0;
      if (gsl_histogram_bins (h) != N)
        status = 1;
      gsl_test (status, "gsl_histogram_bins returns number of bins");
    }
  
    h->bin[2] = 123456.0;
    h->bin[4] = -654321;
  
    {
      double max = gsl_histogram_max_val (h);
      gsl_test (max != 123456.0, "gsl_histogram_max_val finds maximum value");
    }
  
    {
      double min = gsl_histogram_min_val (h);
      gsl_test (min != -654321.0, "gsl_histogram_min_val finds minimum value");
    }
  
    {
      size_t imax = gsl_histogram_max_bin (h);
      gsl_test (imax != 2, "gsl_histogram_max_bin finds maximum value bin");
    }
  
    {
      size_t imin = gsl_histogram_min_bin (h);
      gsl_test (imin != 4, "gsl_histogram_min_bin find minimum value bin");
    }
  
    for (i = 0; i < N; i++)
      {
        h->bin[i] = i + 27;
        g->bin[i] = (i + 27) * (i + 1);
      }
  
    {
      double sum=gsl_histogram_sum (h);
      gsl_test(sum != N*27+((N-1)*N)/2, "gsl_histogram_sum sums all bin values");
    }
  
    gsl_histogram_memcpy (h1, g);
    gsl_histogram_add (h1, h);
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (h1->bin[i] != g->bin[i] + h->bin[i])
            status = 1;
        }
      gsl_test (status, "gsl_histogram_add histogram addition");
    }
  
    gsl_histogram_memcpy (h1, g);
    gsl_histogram_sub (h1, h);
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (h1->bin[i] != g->bin[i] - h->bin[i])
            status = 1;
        }
      gsl_test (status, "gsl_histogram_sub histogram subtraction");
    }
  
  
    gsl_histogram_memcpy (h1, g);
    gsl_histogram_mul (h1, h);
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (h1->bin[i] != g->bin[i] * h->bin[i])
            status = 1;
        }
      gsl_test (status, "gsl_histogram_mul histogram multiplication");
    }
  
  
    gsl_histogram_memcpy (h1, g);
    gsl_histogram_div (h1, h);
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (h1->bin[i] != g->bin[i] / h->bin[i])
            status = 1;
        }
      gsl_test (status, "gsl_histogram_div histogram division");
    }
  
    gsl_histogram_memcpy (h1, g);
    gsl_histogram_scale (h1, 0.5);
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (h1->bin[i] != 0.5 * g->bin[i])
            status = 1;
        }
      gsl_test (status, "gsl_histogram_scale histogram scaling");
    }
  
    gsl_histogram_memcpy (h1, g);
    gsl_histogram_shift (h1, 0.25);
  
    {
      int status = 0;
      for (i = 0; i < N; i++)
        {
          if (h1->bin[i] != 0.25 + g->bin[i])
            status = 1;
        }
      gsl_test (status, "gsl_histogram_shift histogram shift");
    }
  
  
    gsl_histogram_free (h);       /* free whatever is in h */
  
    h = gsl_histogram_calloc_uniform (N, 0.0, 1.0);
  
    gsl_test (h->range == 0,
              "gsl_histogram_calloc_uniform returns valid range pointer");
    gsl_test (h->bin == 0,
              "gsl_histogram_calloc_uniform returns valid bin pointer");
    gsl_test (h->n != N,
              "gsl_histogram_calloc_uniform returns valid size");
  
    gsl_histogram_accumulate (h, 0.0, 1.0);
    gsl_histogram_accumulate (h, 0.1, 2.0);
    gsl_histogram_accumulate (h, 0.2, 3.0);
    gsl_histogram_accumulate (h, 0.3, 4.0);
  
    {
      size_t i1, i2, i3, i4;
      double expected;
      int status = gsl_histogram_find (h, 0.0, &i1);
      status = gsl_histogram_find (h, 0.1, &i2);
      status = gsl_histogram_find (h, 0.2, &i3);
      status = gsl_histogram_find (h, 0.3, &i4);
  
      for (i = 0; i < N; i++)
        {
          if (i == i1)
            {
              expected = 1.0;
            }
          else if (i == i2)
            {
              expected = 2.0;
            }
          else if (i == i3)
            {
              expected = 3.0;
            }
          else if (i == i4)
            {
              expected = 4.0;
            }
          else
            {
              expected = 0.0;
            }
  
          if (h->bin[i] != expected)
            {
              status = 1;
            }
  
        }
      gsl_test (status, "gsl_histogram_find returns index");
    }
  
  
    {
      FILE *f = fopen ("test.txt", "w");
      gsl_histogram_fprintf (f, h, "%.19e", "%.19e");
      fclose (f);
    }
  
    {
      FILE *f = fopen ("test.txt", "r");
      gsl_histogram *hh = gsl_histogram_calloc (N);
      int status = 0;
  
      gsl_histogram_fscanf (f, hh);
  
      for (i = 0; i < N; i++)
        {
          if (h->range[i] != hh->range[i])
            status = 1;
          if (h->bin[i] != hh->bin[i])
            status = 1;
        }
      if (h->range[N] != hh->range[N])
        status = 1;
  
      gsl_test (status, "gsl_histogram_fprintf and fscanf");
  
      gsl_histogram_free (hh);
      fclose (f);
    }
  
    {
      FILE *f = fopen ("test.dat", "wb");
      gsl_histogram_fwrite (f, h);
      fclose (f);
    }
  
    {
      FILE *f = fopen ("test.dat", "rb");
      gsl_histogram *hh = gsl_histogram_calloc (N);
      int status = 0;
  
      gsl_histogram_fread (f, hh);
  
      for (i = 0; i < N; i++)
        {
          if (h->range[i] != hh->range[i])
            status = 1;
          if (h->bin[i] != hh->bin[i])
            status = 1;
        }
      if (h->range[N] != hh->range[N])
        status = 1;
  
      gsl_test (status, "gsl_histogram_fwrite and fread");
  
      gsl_histogram_free (hh);
      fclose (f);
    }
  
    gsl_histogram_free (h);
    gsl_histogram_free (g);
    gsl_histogram_free (h1);
    gsl_histogram_free (hr);
  }
  