C# (CSharp) Chi.chi_square_mean 예제들

예제 #1

    private static void chi_square_sample_test()

//****************************************************************************80
//
//  Purpose:
//
//    CHI_SQUARE_SAMPLE_TEST tests CHI_SQUARE_SAMPLE.
//
//  Licensing:
//
//    This code is distributed under the GNU LGPL license.
//
//  Modified:
//
//    24 January 2007
//
//  Author:
//
//    John Burkardt
//
    {
        const int SAMPLE_NUM = 1000;

        int j;
        int seed = 123456789;

        double[] x = new double[SAMPLE_NUM];

        Console.WriteLine("");
        Console.WriteLine("CHI_SQUARE_SAMPLE_TEST");
        Console.WriteLine("  CHI_SQUARE_MEAN computes the Chi Square mean;");
        Console.WriteLine("  CHI_SQUARE_SAMPLE samples the Chi Square distribution;");
        Console.WriteLine("  CHI_SQUARE_VARIANCE computes the Chi Square variance.");

        double a = 10.0E+00;

        Console.WriteLine("");
        Console.WriteLine("  PDF parameter A =             " + a + "");

        if (!Chi.chi_square_check(a))
        {
            Console.WriteLine("");
            Console.WriteLine("CHI_SQUARE_SAMPLE_TEST - Fatal error!");
            Console.WriteLine("  The parameters are not legal.");
            return;
        }

        double mean     = Chi.chi_square_mean(a);
        double variance = Chi.chi_square_variance(a);

        Console.WriteLine("  PDF mean =                    " + mean + "");
        Console.WriteLine("  PDF variance =                " + variance + "");

        for (j = 0; j < SAMPLE_NUM; j++)
        {
            x[j] = Chi.chi_square_sample(a, ref seed);
        }

        mean     = typeMethods.r8vec_mean(SAMPLE_NUM, x);
        variance = typeMethods.r8vec_variance(SAMPLE_NUM, x);
        double xmax = typeMethods.r8vec_max(SAMPLE_NUM, x);
        double xmin = typeMethods.r8vec_min(SAMPLE_NUM, x);

        Console.WriteLine("");
        Console.WriteLine("  Sample size =     " + SAMPLE_NUM + "");
        Console.WriteLine("  Sample mean =     " + mean + "");
        Console.WriteLine("  Sample variance = " + variance + "");
        Console.WriteLine("  Sample maximum =  " + xmax + "");
        Console.WriteLine("  Sample minimum =  " + xmin + "");
    }