/* nag_mv_discrim_mahaldist (g03dbc) Example Program.
 *
 * Copyright 1998 Numerical Algorithms Group.
 *
 * Mark 5, 1998.
 * Mark 8 revised, 2004.
 *
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nagg03.h>

#define D(I, J)     d[(I) *tdd + J]
#define GMEAN(I, J) gmean[(I) *tdgmean + J]
#define X(I, J)     x[(I) *tdx + J]

int main(void)
{

  Integer         i, j, m, n, ng, nobs, nvar, tdd, tdgmean, tdx;
  Integer         exit_status = 0, *ing = 0, *isx = 0, *nig = 0;
  char            nag_enum_arg[40];
  double          df, sig, stat;
  double          *d = 0, *det = 0, *gc = 0, *gmean = 0, *wt = 0;
  double          *wtptr = 0, *x = 0;
  Nag_GroupCovars equal;
  Nag_Boolean     weight;
  NagError        fail;

  INIT_FAIL(fail);

  printf(
          "nag_mv_discrim_mahaldist (g03dbc) Example Program Results\n\n");

  /* Skip headings in data file */
  scanf("%*[^\n]");
  scanf("%ld", &n);
  scanf("%ld", &m);
  scanf("%ld", &nvar);
  scanf("%ld", &ng);
  scanf("%s", nag_enum_arg);
  /* nag_enum_name_to_value(x04nac).
   * Converts NAG enum member name to value
   */
  weight = (Nag_Boolean) nag_enum_name_to_value(nag_enum_arg);

  if (n >= 1 && nvar >= 1 && m >= nvar && ng >= 2)
    {
      if (!(det = NAG_ALLOC(ng, double)) ||
          !(gc = NAG_ALLOC((ng+1)*nvar*(nvar+1)/2, double)) ||
          !(gmean = NAG_ALLOC(ng*nvar, double)) ||
          !(wt = NAG_ALLOC(n, double)) ||
          !(x = NAG_ALLOC(n*m, double)) ||
          !(ing = NAG_ALLOC(n, Integer)) ||
          !(isx = NAG_ALLOC(m, Integer)) ||
          !(nig = NAG_ALLOC(ng, Integer)))
        {
          printf("Allocation failure\n");
          exit_status = -1;
          goto END;
        }
      tdgmean = nvar;
      tdx = m;
    }
  else
    {
      printf("Invalid n or nvar or m or ng.\n");
      exit_status = 1;
      return exit_status;
    }
  if (weight)
    {
      for (i = 0; i < n; ++i)
        {
          for (j = 0; j < m; ++j)
            scanf("%lf", &X(i, j));
          scanf("%ld", &ing[i]);
          scanf("%lf", &wt[i]);
        }
      wtptr = wt;
    }
  else
    {
      for (i = 0; i < n; ++i)
        {
          for (j = 0; j < m; ++j)
            scanf("%lf", &X(i, j));
          scanf("%ld", &ing[i]);
        }
    }
  for (j = 0; j < m; ++j)
    scanf("%ld", &isx[j]);
  /* nag_mv_discrim (g03dac).
   * Test for equality of within-group covariance matrices
   */
  nag_mv_discrim(n, m, x, tdx, isx, nvar, ing, ng, wtptr, nig,
                 gmean, tdgmean, det, gc, &stat, &df, &sig, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_mv_discrim (g03dac).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }
  scanf("%ld", &nobs);
  scanf("%s", nag_enum_arg);
  equal = (Nag_GroupCovars) nag_enum_name_to_value(nag_enum_arg);
  if (nobs >= 1)
    {
      if (!(d = NAG_ALLOC(nobs*ng, double)))
        {
          printf("Allocation failure\n");
          exit_status = -1;
          goto END;
        }
      tdd = ng;

      for (i = 0; i < nobs; ++i)
        {
          for (j = 0; j < m; ++j)
            scanf("%lf", &X(i, j));
        }

      /* nag_mv_discrim_mahaldist (g03dbc).
       * Mahalanobis squared distances, following nag_mv_discrim
       * (g03dac)
       */
      nag_mv_discrim_mahaldist(equal, Nag_SamplePoints, nvar, ng, gmean,
                               tdgmean, gc, nobs, m, isx, x, tdx, d, tdd,
                               &fail);
      if (fail.code != NE_NOERROR)
        {
          printf("Error from nag_mv_discrim_mahaldist (g03dbc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
      printf("\n   Obs          Distances\n\n");
      for (i = 0; i < nobs; ++i)
        {
          printf(" %3ld", i+1);
          for (j = 0; j < ng; ++j)
            printf("%10.3f", D(i, j));
          printf("\n");
        }
    }

 END:
  if (d) NAG_FREE(d);
  if (det) NAG_FREE(det);
  if (gc) NAG_FREE(gc);
  if (gmean) NAG_FREE(gmean);
  if (wt) NAG_FREE(wt);
  if (x) NAG_FREE(x);
  if (ing) NAG_FREE(ing);
  if (isx) NAG_FREE(isx);
  if (nig) NAG_FREE(nig);

  return exit_status;
}