//      g02hm Example Program Text
//      C# version, NAG Copyright 2008
using System;
using NagLibrary;
using System.Globalization;
using System.IO;
namespace NagDotNetExamples
{
  public class G02HME
  {
    static string datafile = "ExampleData/g02hme.d";
    static double[] ruser = new double[2];
    static void Main(String[] args)
    {
      if (args.Length == 1)
      {
        datafile = args[0];
      }
      StartExample();
    }
    public static void StartExample()
    {
      try
      {
        G02.G02HM_UCV ucvG02HM = new G02.G02HM_UCV(ucv);
        DataReader sr = new DataReader(datafile);
        double bd,   bl,   tol; int i,  indm,  j,  k,  l1,  l2,  m,  maxit,  mm,  n,  nit,  nitmon;
        int ifail;
        Console.WriteLine("g02hm 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[] a = new double[m*(m+1)/2];
        double[] cov = new double[m*(m+1)/2];
        double[] theta = new double[m];
        double[] wt = new double[n];
        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 the initial value of A
          mm = ((m + 1) * m) / 2;
          sr.Reset();
          for (j = 1; j <= mm; j++)
          {
            a[j - 1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
          }
          //         Read in the initial value of theta
          sr.Reset();
          for (j = 1; j <= m; j++)
          {
            theta[j - 1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
          }
          //         Read in the values of the parameters of the ucv functions
          sr.Reset();
          ruser[0] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
          ruser[1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
          //         Set the values remaining parameters
          indm = 1;
          bl = 0.90e0;
          bd = 0.90e0;
          maxit = 50;
          tol = 0.50e-4;
          // Change nitmon to a positive value if monitoring information
          // is required
          nitmon = 0;
          // 
          G02.g02hm(ucvG02HM, indm, n, m, x, cov, a, wt, theta, bl, bd, maxit, nitmon, tol, out nit,
          out ifail);
          // 
          if (ifail == 0)
          {
            Console.WriteLine(" ");
            Console.Write("  {0}{1,4}{2}", "g02hm required ", nit, " iterations to converge");
            Console.WriteLine(" ");
            Console.Write(" {0}", "Robust covariance matrix");
            Console.WriteLine(" ");
            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}", "Robust estimates of THETA");
            for (j = 1; j <= m; j++)
            {
              Console.WriteLine("  {0,10:f3}", theta[j - 1]);
            }
          }
          else
          {
            Console.WriteLine(" ");
            Console.WriteLine("** g02hm failed with ifail = {0,5}", ifail);
          }
        }
        // 
      }
      catch (Exception e)
      {
        Console.WriteLine(e.Message);
        Console.Write( "Exception Raised");
      }
    }
    public static void ucv(double t, out double u, out double w)
    {
      //      u function
      double cu,   cw,   t2; cu = ruser[0];
      u = 1.00e0;
      if (t != 0)
      {
        t2 = t * t;
        if (t2 > cu)
        {
          u = cu / t2;
        }
      }
      //      w function
      cw = ruser[1];
      if (t > cw)
      {
        w = cw / t;
      }
      else
      {
        w = 1.00e0;
      }
    }
  }
}