/* nag_univar_robust_1var_median (g07dac) Example Program.
 *
 * Copyright 2024 Numerical Algorithms Group.
 *
 * Mark 30.3, 2024.
 *
 */

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

int main(void) {
  Integer exit_status = 0, i, n;
  NagError fail;
  double *x = 0, xmd, xme, xsd, *y = 0;

  INIT_FAIL(fail);

  printf("nag_univar_robust_1var_median (g07dac) Example Program Results\n");
  /* Skip heading in data file */
  scanf("%*[^\n]");
  scanf("%" NAG_IFMT "", &n);
  if (n > 1) {
    if (!(x = NAG_ALLOC(n, double)) || !(y = NAG_ALLOC(n, double))) {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  } else {
    printf("Invalid n.\n");
    exit_status = 1;
    return exit_status;
  }
  for (i = 0; i < n; ++i)
    scanf("%lf", &x[i]);
  /* nag_univar_robust_1var_median (g07dac).
   * Robust estimation, median, median absolute deviation,
   * robust standard deviation
   */
  nag_univar_robust_1var_median(n, x, y, &xme, &xmd, &xsd, &fail);
  if (fail.code != NE_NOERROR) {
    printf("Error from nag_univar_robust_1var_median (g07dac).\n%s\n",
           fail.message);
    exit_status = 1;
    goto END;
  }

  printf("Output y:\n");
  for (i = 0; i < n; ++i)
    printf("%6.3f%s", y[i], (i % 11 == 10 || i == n - 1) ? "\n" : " ");
  printf("\nxme = %6.3f, xmd = %6.3f, xsd = %6.3f\n", xme, xmd, xsd);
END:
  NAG_FREE(x);
  NAG_FREE(y);
  return exit_status;
}