//      g02da Example Program Text
//      C# version, NAG Copyright 2008
using System;
using NagLibrary;
using System.Globalization;
using System.IO;
namespace NagDotNetExamples
{
  public class G02DAE
  {
    static string datafile = "ExampleData/g02dae.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 rss,    tol;  int i,  idf,  ip,  irank,  j,  m,  n;
        bool svd = false;
        string mean = "",
        weight = "";
        int ifail;
        Console.WriteLine("g02da Example Program Results");
        //      Skip heading in data file
        sr.Reset();
        sr.Reset();
        n = int.Parse(sr.Next());
        m = int.Parse(sr.Next());
        weight = sr.Next();
        mean = sr.Next();
        Console.WriteLine(" ");
        double[] h = new double[n];
        double[] res = new double[n];
        double[] wt = new double[n];
        double[,] x = new double[n, m];
        double[] y = new double[n];
        int[] isx = new int[m];
        if ( n >= 2 && m >=1 )
        {
          if ((weight == "W") || (weight == "w"))
          {
            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);
              }
              y[i - 1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
              wt[i - 1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
            }
          }
          else
          {
            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);
              }
              y[i - 1] = double.Parse(sr.Next(), CultureInfo.InvariantCulture);
            }
          }
          sr.Reset();
          for (j = 1; j <= m; j++)
          {
            isx[j - 1] = int.Parse(sr.Next());
          }
          //         Calculate ip
          ip = 0;
          if ((mean == "M") || (mean == "m"))
          {
            ip = ip + 1;
          }
          for (i = 1; i <= m; i++)
          {
            if (isx[i - 1] > 0)
            {
              ip = ip + 1;
            }
          }
          //         Set tolerance
          tol = 0.000010e0;
          // 
          double[] b = new double[ip];
          double[] cov = new double[(ip * ip + ip) / 2];
          double[] p = new double[ip * (ip + 2)];
          double[,] q = new double[n, ip + 1];
          double[] se = new double[ip];
          double[] wk = new double[ip*ip + 5*(ip - 1)];
          G02.g02da(mean, weight, n, x, m, isx, ip, y, wt, out rss, out idf, b, se, cov, res, h, q,
          out svd, out irank, p, tol, wk, out ifail);
          // 
          if (ifail == 0)
          {
            // 
            if (svd)
            {
              Console.Write("  {0}{1,4}", "Model not of full rank, rank = ", irank);
              Console.WriteLine(" ");
            }
            Console.WriteLine("  {0}{1,12:e4}", "Residual sum of squares = ", rss);
            Console.WriteLine("  {0}{1,4}", "Degrees of freedom = ", idf);
            Console.WriteLine(" ");
            Console.WriteLine(" {0} {1}", "Variable   Parameter estimate   ", "Standard error");
            Console.WriteLine(" ");
            for (j = 1; j <= ip; j++)
            {
              Console.WriteLine("  {0,6}{1,20:e4}{2,20:e4}", j, b[j - 1], se[j - 1]);
            }
            Console.WriteLine(" ");
            Console.Write(" {0}", "   Obs          Residuals              H");
            Console.WriteLine(" ");
            for (i = 1; i <= n; i++)
            {
              Console.WriteLine("  {0,6}{1,20:e4}{2,20:e4}", i, res[i - 1], h[i - 1]);
            }
          }
          else
          {
            Console.WriteLine(" ");
            Console.WriteLine("** g02da failed with ifail = {0,5}", ifail);
          }
        }
        // 
      }
      catch (Exception e)
      {
        Console.WriteLine(e.Message);
        Console.Write( "Exception Raised");
      }
    }
  }
}