/* nag_tsa_spectrum_bivar(g13cdc) Example Program.
 *
 * Copyright 1996 Numerical Algorithms Group.
 *
 * Mark 4, 1996.
 *
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <naga02.h>
#include <nagg13.h>

#define L 80
#define KC 8*L
#define NXYMAX 300

int main(void)
{

  double x[KC], y[KC];
  double pxy;
  double pw;

  Complex *g;

  Integer i, j, ng, is;
  Integer mw;
  Integer nxy;
  Integer kc=KC, l=L;

  Vprintf("g13cdc Example Program Results\n");

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

  Vscanf("%ld ", &nxy);
  if (nxy > 0 && nxy <= NXYMAX)
    {
      for (i = 1; i <= nxy; ++i)
        Vscanf("%lf ", &x[i - 1]);
      for (i = 1; i <= nxy; ++i)
        Vscanf("%lf ", &y[i - 1]);

      /* Set parameters for call to g13cdc */
      /* Mean correction and 10 percent taper */
      pxy = 0.1;
      /* Window shape parameter and zero covariance at lag 16 */
      pw = 0.5;
      mw = 16;
      /* Alignment shift of 3 */
      is = 3;

      g13cdc(nxy, Nag_Mean, pxy, mw, is, pw, l, kc, x, y, &g,
             &ng, NAGERR_DEFAULT);

      Vprintf("\n                       Returned sample spectrum\n");
      Vprintf("\n       Real  Imaginary       Real  Imaginary   "
              "    Real  Imaginary\n");
      Vprintf("       part     part         part     part     "
              "    part     part\n\n");
      for (j = 1; j <= ng; ++j)
        Vprintf("%5ld%8.4f%9.4f%s",
                j,a02bbc(g[j - 1]),a02bcc(g[j - 1]), (j%3==0 ? "\n" : ""));
      Vprintf("\n");
      if (g)
        NAG_FREE(g);
    }
  return EXIT_SUCCESS;
}