/* nag_double_quantiles (g01amc) Example Program.
 *
 * Copyright 2006 Numerical Algorithms Group.
 *
 * Mark 9, 2009.
 */

#include <nag.h>
#include <nagx04.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nag_stddef.h>
#include <nagg01.h>

int main(int argc, char *argv[])
{
  FILE     *fpin, *fpout;
  /* Scalars */
  Integer  exit_status = 0, i, n, nq;
  /* Arrays */
  double   *vec = 0, *quants = 0, *quant_vec = 0;
  /* Nag Types */
  NagError fail;

  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);

  /* Skip heading in data file */
  fscanf(fpin, "%*[^\n]");
  fprintf(fpout, "nag_double_quantiles (g01amc) Example Program Results\n");
  fscanf(fpin, "%ld", &n);
  fscanf(fpin, "%ld", &nq);
  if (n >= 1 && nq >= 1)
    {
      if (!(vec = NAG_ALLOC(n, double)) ||
          !(quants = NAG_ALLOC(nq, double)) ||
          !(quant_vec = NAG_ALLOC(nq, double)))
        {
          fprintf(fpout, "Allocation failure\n");
          exit_status = -1;
          goto END;
        }
    }
  else
    {
      if (n < 1)
        {
          fprintf(fpout, "Invalid n.\n");
        }
      else
        {
          fprintf(fpout, "Invalid nq.\n");
        }
      exit_status = 1;
      goto END;
    }
  for (i = 0; i < n; ++i)
    fscanf(fpin, "%lf", &vec[i]);
  for (i = 0; i < nq; ++i)
    fscanf(fpin, "%lf", &quants[i]);

  /* nag_double_quantiles (g01amc).
   * Find quantiles of set of values of data type double
   */
  nag_double_quantiles((size_t) n, vec, (size_t) nq, quants, quant_vec, &fail);
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_double_quantiles (g01amc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  fprintf(fpout, "    Quantile   Result\n\n");
  for (i = 0; i < nq; ++i)
    {
      fprintf(fpout, "   %7.4f     %7.4f\n", quants[i], quant_vec[i]);
    }

 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  if (vec) NAG_FREE(vec);
  if (quants) NAG_FREE(quants);
  if (quant_vec) NAG_FREE(quant_vec);

  return exit_status;
}