/* nag_median_test (g08acc) Example Program.
 *
 * Copyright 2000 Numerical Algorithms Group.
 *
 * Mark 6, 2000.
 */

#include <stdio.h>
#include <nag.h>
#include <nagx04.h>
#include <nag_stdlib.h>
#include <nagg08.h>

int main(int argc, char *argv[])
{
  FILE     *fpin, *fpout;
  Integer  above, below, exit_status = 0, i, n1, n2;
  NagError fail;
  double   p, *x = 0, *y = 0;

  INIT_FAIL(fail);

  /* Check for command-line IO options */
  fpin = nag_example_file_io(argc, argv, "-data", NULL);
  fpout = nag_example_file_io(argc, argv, "-results", NULL);
  fprintf(fpout, "nag_median_test (g08acc) Example Program Results\n");

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

  n1 = 16;
  n2 = 23;
  if (!(x = NAG_ALLOC(n1, double))
     || !(y = NAG_ALLOC(n2, double)))
    {
      fprintf(fpout, "Allocation failure\n");
      exit_status = -1;
      goto END;
    }

  for (i = 1; i <= n1; ++i)
    fscanf(fpin, "%lf", &x[i - 1]);
  for (i = 1; i <= n2; ++i)
    fscanf(fpin, "%lf", &y[i - 1]);
  fprintf(fpout, "\nMedian test\n\n");
  fprintf(fpout, "Data values\n\n");
  fprintf(fpout, "    Group 1  ");
  for (i = 1; i <= n1; ++i)
    fprintf(fpout, "%4.0f%s", x[i - 1], i%8?"":"\n             ");
  fprintf(fpout, "\n");
  fprintf(fpout, "    Group 2  ");
  for (i = 1; i <= n2; ++i)
    fprintf(fpout, "%4.0f%s", y[i - 1], i%8?"":"\n             ");
  fprintf(fpout, "\n");
  /* nag_median_test (g08acc).
   * Median test on two samples of unequal size
   */
  nag_median_test(n1, x, n2, y, &above, &below, &p, &fail);
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_median_test (g08acc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  fprintf(fpout, "\n");
  fprintf(fpout, "%6ld%s\n", above, " scores below median in group 1");
  fprintf(fpout, "%6ld%s\n", below, " scores below median in group 2");
  fprintf(fpout, "\n%s%8.5f\n", "     Significance  ", p);
 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  if (x) NAG_FREE(x);
  if (y) NAG_FREE(y);
  return exit_status;
}