/* nag_kruskal_wallis_test (g08afc) Example Program.
 *
 * Copyright 2000 Numerical Algorithms Group.
 *
 * Mark 6, 2000.
 */

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagg08.h>

int main (void)
{
  double h, p, *x=0;
  Integer count, i, ii, k, *l=0, lx, nhi, ni, nlo;
  Integer exit_status=0;
  NagError fail;

  INIT_FAIL(fail);
  Vprintf("g08afc Example Program Results\n");

/* Skip heading in data file */
  Vscanf("%*[^\n]");

  k=5;
  if (!(l =NAG_ALLOC(k, Integer)))
    {
      Vprintf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  for (i=1; i<=k; i++)
    Vscanf("%ld", &l[i-1]);
  Vprintf("\n");
  Vprintf("%s\n", "Kruskal-Wallis test");
  Vprintf("\n");
  Vprintf("%s\n","Data values");
  Vprintf("\n");
  Vprintf("%s\n","  Group    Observations");

  lx = 0;
  for (i = 1; i <= 5; ++i)
    lx += l[i - 1];

  if (!(x = NAG_ALLOC(lx, double)))
    {
      Vprintf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  for (i = 1; i <= lx; ++i)
    Vscanf("%lf", &x[i - 1]);

  nlo = 1;
  for (i = 1; i <= k; ++i)
    {
      ni = l[i - 1];
      nhi = nlo + ni - 1;
      Vprintf(" %5ld     ", i);
      count = 1;
      for (ii = nlo; ii <= nhi; ++ii)
        {
          Vprintf("%4.0f%s", x[ii - 1], count%10?"":"\n");
          count++;
        }
      nlo += ni;
      Vprintf("\n");

    }
  g08afc(k, l, x, lx,  &h, &p, &fail);
  if (fail.code != NE_NOERROR)
        {
          Vprintf("Error from g08afc.\n%s\n", fail.message);
          exit_status = 1;
          goto END;
        }
  Vprintf("\n");
  Vprintf("%s%9.3f\n", "Test statistic       ", h);
  Vprintf("%s%9ld\n",  "Degrees of freedom   ", k-1);
  Vprintf("%s%9.3f\n","Significance         ", p);
 END:
  if (l) NAG_FREE(l);
  if (x) NAG_FREE(x);
  return exit_status;
}