/* nag_glm_est_func(g02gnc) Example Program.
 *
 * Copyright 1996 Numerical Algorithms Group.
 *
 * Mark 4, 1996.
 *
 * Mark 6 revised, 2000.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nagg02.h>

#define NMAX 15
#define MMAX  9
#define TDC MMAX
#define TDX MMAX
#define TDV MMAX+6

int main(void)
{
  Boolean est;
  Integer i, ip, j, m, n, nestfn;
  double  ex_power;
  double  sestat, stat, z;
  Integer sx[MMAX];
  double  b[MMAX], f[MMAX], v[NMAX][TDV], x[NMAX][MMAX],
  y[NMAX];
  double  *wtptr;
  Integer max_iter;
  Integer print_iter;
  double eps;
  double tol;
  double df;
  double dev;
  Integer rank;
  double cov[MMAX*(MMAX+1)/2], se[MMAX];
  static  NagError fail;

  Vprintf("g02gnc Example Program Results\n");
  /* Skip heading in data file */
  Vscanf("%*[^\n]");
  Vscanf("%ld %ld %ld", &n, &m, &print_iter);

  if (n<=NMAX && m<MMAX)
    {
      wtptr = (double *)0;
      for (i=0; i<n; i++)
        {
          for (j=0; j<m; j++)
            Vscanf("%lf", &x[i][j]);
          Vscanf("%lf", &y[i]);
        }
      for (j=0; j<m; j++)
        Vscanf("%ld", &sx[j]);
      Vscanf("%ld", &ip);

      /* Set control parameters */
      max_iter = 10;
      tol = 5e-5;
      eps = 1e-6;
      ex_power = 0.0;

      /* Fit Log-linear model using g02gcc */

      g02gcc(Nag_Log, Nag_MeanInclude, n, &x[0][0], (Integer)TDX,
             m, sx, ip, y, wtptr, (double *)0, ex_power, &dev, &df, b, &rank, se, cov,
             &v[0][0], (Integer)TDV, tol, max_iter, print_iter, "", eps, &fail);

      if (fail.code == NE_NOERROR || fail.code == NE_LSQ_ITER_NOT_CONV ||
          fail.code == NE_RANK_CHANGED || fail.code == NE_ZERO_DOF_ERROR)
        {
          Vprintf("\nDeviance = %12.4e\n", dev);
          Vprintf("Degrees of freedom = %3.1f\n\n", df);
          Vprintf("       Estimate     Standard error\n\n");
          for (i=0; i<ip; i++)
            Vprintf("%14.4f%14.4f\n", b[i], se[i]);
          Vprintf("\n");
          Vscanf("%ld", &nestfn);
          for (i=1; i<=nestfn; ++i)
            {
              for (j=0; j<ip; ++j)
                Vscanf("%lf", &f[j]);

              g02gnc(ip, rank, b, cov, &v[0][0],
                     (Integer)TDV, f, &est, &stat, &sestat, &z, tol,
                     &fail);

              if (fail.code==NE_NOERROR || fail.code==NE_RANK_EQ_IP)
                {
                  Vprintf("\n");
                  Vprintf("Function %ld\n\n", i);
                  for (j=0; j<ip; ++j)
                    Vprintf("%8.2f%c", f[j], (j%5==4 || j==ip-1) ? '\n' : ' ');
                  Vprintf("\n");
                  if (est)
                    Vprintf("stat = %10.4f  sestat = %10.4f   z = %10.4f\n",
                            stat, sestat, z);
                  else
                    Vprintf("Function not estimable\n");
                }
              else
                Vprintf("%s\n", fail.message);
            }
        }
      else
        {
          Vprintf("%s\n", fail.message);
          return EXIT_FAILURE;
        }
    }
  else
    {
      Vfprintf(stderr, "One or both of m and n are out of range:"
               " m = %-3ld while  n = %-3ld\n", m, n);
      return EXIT_FAILURE;
    }
  return EXIT_SUCCESS;
}