/* nag_tsa_multi_diff (g13dlc) Example Program.
 *
 * Copyright 2002 Numerical Algorithms Group.
 *
 * Mark 7, 2002.
 */

#include <stdio.h>
#include <nag.h>
#include <nagx04.h>
#include <nag_stdlib.h>
#include <nagg13.h>

int main(int argc, char *argv[])
{
  FILE     *fpin, *fpout;
  /* Scalars */
  Integer  exit_status, i, j, k, maxd, mind, n, nd, nw,
           pdw, pddelta, kmax;
  NagError fail;

  /* Arrays */
  double   *delta = 0, *w = 0, *z = 0;
  Integer  *id = 0, *tr = 0;

#define W(I, J)     w[(J-1)*pdw + I - 1]
#define DELTA(I, J) delta[(J-1)*pddelta + I - 1]
#define Z(I, J)     z[(J-1)*kmax + I - 1]

  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);
  exit_status = 0;

  fprintf(fpout, "nag_tsa_multi_diff (g13dlc) Example Program Results\n");

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

  fscanf(fpin, "%ld%ld%*[^\n] ", &k, &n);

  if (k > 0 && n > 0)
    {
      kmax = k;
      /* Allocate array id */
      if (!(id = NAG_ALLOC(k, Integer)))
        {
          fprintf(fpout, "Allocation failure\n");
          exit_status = -1;
          goto END;
        }

      for (i = 1; i <= k; ++i)
        fscanf(fpin, "%ld", &id[i-1]);
      fscanf(fpin, "%*[^\n] ");

      mind = 0;
      maxd = 0;
      for (i = 1; i <= k; ++i)
        {
          mind = MIN(mind, id[i-1]);
          maxd = MAX(maxd, id[i-1]);
        }

      if (mind >= 0)
        {
          /* Allocate arrays */
          nw = n - maxd;
          if (!(tr = NAG_ALLOC(k, Integer)) ||
              !(delta = NAG_ALLOC(kmax * maxd, double)) ||
              !(w = NAG_ALLOC(kmax * nw, double)) ||
              !(z = NAG_ALLOC(kmax * n, double)))
            {
              fprintf(fpout, "Allocation failure\n");
              exit_status = -1;
              goto END;
            }

          pdw = kmax;
          pddelta = kmax;

          for (i = 1; i <= k; ++i)
            {
              for (j = 1; j <= n; ++j)
                fscanf(fpin, "%lf", &Z(i, j));
              fscanf(fpin, "%*[^\n] ");
            }

          for (i = 1; i <= k; ++i)
            fscanf(fpin, "%ld", &tr[i-1]);
          fscanf(fpin, "%*[^\n] ");

          if (maxd > 0)
            {
              for (i = 1; i <= k; ++i)
                {
                  for (j = 1; j <= id[i-1]; ++j)
                    fscanf(fpin, "%lf", &DELTA(i, j));
                  fscanf(fpin, "%*[^\n] ");
                }
            }

          /* nag_tsa_multi_diff (g13dlc).
           * Multivariate time series, differences and/or transforms
           */
          nag_tsa_multi_diff(k, n, z, tr, id, delta, w, &nd, &fail);

          if (fail.code != NE_NOERROR)
            {
              fprintf(fpout, "Error from nag_tsa_multi_diff (g13dlc).\n%s\n",
                      fail.message);
              exit_status = 1;
              goto END;
            }
          fprintf(fpout, "\n");
          fprintf(fpout, " Transformed/Differenced series\n");
          fprintf(fpout, " ------------------------------\n");

          for (i = 1; i <= k; ++i)
            {
              fprintf(fpout, "\n");
              fprintf(fpout, " Series %2ld\n", i);
              fprintf(fpout, " -----------\n");
              fprintf(fpout, "\n");
              fprintf(fpout, " Number of differenced values = %6ld\n",
                      nd);
              fprintf(fpout, "\n");
              for (j = 1; j <= nd; ++j)
                {
                  fprintf(fpout, "%10.3f", W(i, j));
                  if (j % 8 == 0 || j == nd)
                    fprintf(fpout, "\n");
                }
            }
        }
    }

 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  if (tr) NAG_FREE(tr);
  if (delta) NAG_FREE(delta);
  if (w) NAG_FREE(w);
  if (z) NAG_FREE(z);
  if (id) NAG_FREE(id);

  return exit_status;
}