//      g02hk Example Program Text
//      C# version, NAG Copyright 2008
using System;
using NagLibrary;
using System.Globalization;
using System.IO;
namespace NagDotNetExamples
{
  public class G02HKE
  {
    static string datafile = "ExampleData/g02hke.d";
    static void Main(String[] args)
    {
      if (args.Length == 1)
      {
        datafile = args[0];
      }
      StartExample();
    }
    public static void StartExample()
    {
      try
      {
        DataReader sr = new DataReader(datafile);
        double eps,   tol; int i,  j,  k,  l1,  l2,  m,  maxit,  n,  nit,  nitmon;
        int ifail;
        Console.WriteLine("g02hk Example Program Results");
        //      Skip heading in data file
        sr.Reset();
        //      Read in the dimensions of X
        sr.Reset();
        n = int.Parse(sr.Next());
        m = int.Parse(sr.Next());
        double[] cov = new double[m*(m+1)/2];
        double[] theta = new double[m];
        double[,] x = new double[n, m];
        if (n > 0 && m > 0 && m <=n)
        {
          //         Read in the x matrix
          for (i = 1; i <= n; i++)
          {
            sr.Reset();
            for (j = 1; j <= m; j++)
            {
              x[i - 1, j - 1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
            }
          }
          //         Read in value of eps
          sr.Reset();
          eps = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
          //         Set up remaining parameters
          maxit = 100;
          tol = 0.50e-4;
          //         Set nitmon to positive value for iteration monitoring
          nitmon = 0;
          // 
          G02.g02hk(n, m, x, eps, cov, theta, maxit, nitmon, tol, out nit, out ifail);
          // 
          if (ifail == 0)
          {
            Console.WriteLine(" ");
            Console.Write("  {0}{1,4}{2}", "g02hk required ", nit, " iterations to converge");
            Console.WriteLine(" ");
            Console.WriteLine(" {0}", "Covariance matrix\n");
            l2 = 0;
            for (j = 1; j <= m; j++)
            {
              l1 = l2 + 1;
              l2 = l2 + j;
              for (k = l1; k <= l2; k++)
              {
                Console.Write(" {0,10:f3}", cov[k - 1]);
              }
              Console.WriteLine(" ");
            }
            Console.WriteLine(" ");
            Console.WriteLine(" {0}", "THETA");
            for (j = 1; j <= m; j++)
            {
              Console.WriteLine("  {0,10:f3}", theta[j - 1]);
            }
          }
          else
          {
            Console.WriteLine(" ");
            Console.WriteLine("** g02hk failed with ifail = {0,5}", ifail);
          }
        }
        // 
      }
      catch (Exception e)
      {
        Console.WriteLine(e.Message);
        Console.Write( "Exception Raised");
      }
    }
  }
}