/* nag_dummy_vars (g04eac) Example Program.
 *
 * Copyright 2000 Numerical Algorithms Group.
 *
 * Mark 6, 2000.
 */

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagg02.h>
#include <nagg04.h>

int main (void)
{
  char mean[2], type[2], weight[2];
  double *b=0, *cov=0, df, *h=0, *p=0, *q=0, *rep, *res, rss, *se=0, tol;
  double *v=0, *com_ar=0, *wtptr=0, *wt=0, *x=0, *y=0;
  Integer i, *ifact=0, ip, irank, *isx=0, j, levels, m, n, tdq, tdx;
  Integer exit_status=0;
  Boolean svd;
  Nag_DummyType dum_type;
  NagError fail;
  Nag_IncludeMean mean_enum;

  INIT_FAIL(fail);
  Vprintf("g04eac Example Program Results\n");

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

  Vscanf("%ld %ld %s %s %s", &n, &levels, type, weight, mean);
  if (*type == 'P')
    dum_type = Nag_Poly;
  else if (*type == 'H')
    dum_type = Nag_Helmert;
  else if (*type == 'F')
    dum_type = Nag_FirstLevel;
  else if (*type == 'L')
    dum_type = Nag_LastLevel;
  else if (*type == 'C')
    dum_type = Nag_AllLevels;
  else
    dum_type = (Nag_DummyType)-999;


  if (*mean == 'M')
    mean_enum = Nag_MeanInclude;
  else if (*mean == 'Z')
    mean_enum = Nag_MeanZero;
  else
    mean_enum = (Nag_IncludeMean)-999;

  if (dum_type == Nag_AllLevels)
    tdx = levels;
  else
    tdx = levels - 1;

  if (!(x = NAG_ALLOC(n*tdx, double))
      || !(rep = NAG_ALLOC(levels, double)))
    {
      Vprintf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  if (dum_type == Nag_Poly)
    {
      if (!(v=NAG_ALLOC(levels, double)))
        {
          Vprintf("Allocation failure\n");
          exit_status = -1;
          goto END;
        }
    }
  else
    {
      if (!(v=NAG_ALLOC(1, double)))
        {
          Vprintf("Allocation failure\n");
          exit_status = -1;
          goto END;
        }
    }
  if (!(wt = NAG_ALLOC(n, double))
      || !(y = NAG_ALLOC(n, double))
      || !(ifact = NAG_ALLOC(n, Integer)))
    {
      Vprintf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  Vprintf("\n");
  if (*weight == 'W')
    {
      for (i = 1; i <= n; ++i)
        Vscanf("%ld %lf %lf", &ifact[i - 1], &y[i - 1], &wt[i - 1]);
      wtptr=wt;
    }
  else
    {
      for (i = 1; i <= n; ++i)
        Vscanf("%ld %lf",  &ifact[i - 1], &y[i - 1]);
      wtptr = 0;
    }
  if (dum_type == Nag_Poly)
    for (j = 1; j <= levels; ++j)
      Vscanf("%lf", &v[j - 1]);

  /* Calculate dummy variables */
  g04eac(dum_type, n, levels, ifact, x, tdx, v, rep, &fail);
  if (fail.code != NE_NOERROR)
    {
      Vprintf("Error from g04eac.\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

  m = tdx;
  ip = m;
  if (mean_enum == Nag_MeanInclude)
    ++ip;
  if (!(b=NAG_ALLOC(ip, double))
      || !(se=NAG_ALLOC(ip, double))
      || !(cov=NAG_ALLOC(ip*(ip+1)/2, double))
      || !(p=NAG_ALLOC(2*ip + ip*ip, double))
      || !(com_ar=NAG_ALLOC(5*(ip-1) + ip*ip, double))
      || !(h=NAG_ALLOC(n, double))
      || !(res=NAG_ALLOC(n, double))
      || !(q=NAG_ALLOC(n*(ip+1), double))
      || !(tdq = ip+1)
      || !(isx=NAG_ALLOC(m, Integer)))
    {
      Vprintf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }

  for (j = 1; j <= m; ++j)
    isx[j - 1] = 1;

  /* Set tolerance */
  tol = 1e-5;
  g02dac(mean_enum, n, x, tdx, m, isx, ip, y, wtptr, &rss, &df, b,
         se, cov, res, h, q, tdq, &svd, &irank, p, tol, com_ar, &fail);
  if (fail.code != NE_NOERROR)
    {
      Vprintf("Error from g04dac.\n%s\n", fail.message);
      exit_status = 1;
      goto END;

    }

  if (svd)
    Vprintf(" %s%4ld\n\n", "Model not of full rank, rank = ", irank);

  Vprintf(" %s %12.4e\n", "Residual sum of squares = ", rss);
  Vprintf(" %s%4.0f\n\n","Degrees of freedom = ", df);
  Vprintf("%s\n\n", "Variable       Parameter estimate    Standard error");
  for (j = 1; j <= ip; ++j)
    Vprintf(" %6ld %20.4e %20.4e\n", j, b[j - 1], se[j - 1]);
 END:
  if (x) NAG_FREE(x);
  if (rep) NAG_FREE(rep);
  if (v) NAG_FREE(v);
  if (v) NAG_FREE(v);
  if (wt) NAG_FREE(wt);
  if (y) NAG_FREE(y);
  if (ifact) NAG_FREE(ifact);
  if (b) NAG_FREE(b);
  if (se) NAG_FREE(se);
  if (cov) NAG_FREE(cov);
  if (p) NAG_FREE(p);
  if (com_ar) NAG_FREE(com_ar);
  if (h) NAG_FREE(h);
  if (res) NAG_FREE(res);
  if (q) NAG_FREE(q);
  if (isx) NAG_FREE(isx);
  return exit_status;
}