/* nag_mv_prin_comp (g03aac) Example Program.
 *
 * Copyright 1998 Numerical Algorithms Group.
 *
 * Mark 5, 1998.
 *
 */

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

#define NMAX 12
#define MMAX 3

int main(void)
{
  double p[MMAX][MMAX] ,s[MMAX];
  double e[MMAX][6];
  double v[NMAX][MMAX], x[NMAX][MMAX], wt[NMAX];
  double *wtptr=0;

  Integer isx[MMAX];
  Integer nvar,tdx=MMAX, tde=6, tdp=MMAX, tdv=MMAX;
  Integer i, j, m, n;

  Nag_PrinCompMat pcmatrix;
  Nag_PrinCompScores scores;

  char weight[2], matrix[2], std[2];

  Vprintf("g03aac Example Program Results\n\n");

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

  Vscanf("%s",matrix);
  Vscanf("%s",std);
  Vscanf("%s",weight);
  Vscanf("%ld",&n);
  Vscanf("%ld",&m);

  if (*matrix == 'C')
    pcmatrix = Nag_MatCorrelation;
  else if (*matrix == 'S')
    pcmatrix = Nag_MatStandardised;
  else if (*matrix == 'U')
    pcmatrix =  Nag_MatSumSq;
  else
    pcmatrix =  Nag_MatVarCovar;

  if (*std == 'S')
    scores = Nag_ScoresStand;
  else if (*std == 'U')
    scores = Nag_ScoresNotStand;
  else if (*std == 'Z')
    scores = Nag_ScoresUnitVar;
  else
    scores = Nag_ScoresEigenval;

  if (n <= NMAX && m <= MMAX)
    {
      if (*weight == 'U')
        {
          for (i = 0; i < n; ++i)
            {
              for (j = 0; j < m; ++j)
                Vscanf("%lf",&x[i][j]);
            }
        }
      else
        {
          for (i = 0; i < n; ++i)
            {
              for (j = 0; j < m; ++j)
                Vscanf("%lf",&x[i][j]);
              Vscanf("%lf",&wt[i]);
            }
          wtptr = wt;
        }
      for (j = 0; j < m; ++j)
        {
          Vscanf("%ld",&isx[j]);
        }
      Vscanf("%ld",&nvar);
      if (pcmatrix == Nag_MatStandardised)
        {
          for (j = 0; j < m; ++j)
            Vscanf("%lf",&s[j]);
        }

      g03aac(pcmatrix, scores, n, m, &x[0][0], tdx, isx, s, wtptr, nvar,
             &e[0][0], tde, &p[0][0], tdp, &v[0][0], tdv, NAGERR_DEFAULT);

      Vprintf("Eigenvalues  Percentage  Cumulative     Chisq      DF     Sig\n");
      Vprintf("               variation   variation\n\n");
      for (i = 0; i < nvar; ++i)
        {
          for (j = 0; j < 6; ++j)
            Vprintf("%11.4f",e[i][j]);
          Vprintf("\n");
        }
      Vprintf("\nEigenvalues \n\n");
      for (i = 0; i < nvar; ++i)
        {
          for (j = 0; j < nvar; ++j)
            Vprintf("%9.4f",p[i][j]);
          Vprintf("\n");
        }
      Vprintf("\nPrincipal component scores \n\n");
      for (i = 0; i < n; ++i)
        {
          Vprintf("%2ld", i+1);
          for (j = 0; j < nvar; ++j)
            Vprintf("%9.3f", v[i][j]);
          Vprintf("\n");
        }
      return EXIT_SUCCESS;
    }
  else
    {
      Vprintf("Incorrect input value of n or m.\n");
      return EXIT_FAILURE;
    }
}