Example: The Cumulative Distribution Functions

using System;
using Imsl.Stat;

public class CdfEx1
{
	public static void  Main(String[] args)
	{
		double x, prob, result;
		int p, q, k, n;
		// Beta
		x = .5;
		p = 12;
		q = 12;
		result = Cdf.Beta(x, p, q);
		Console.Out.WriteLine("beta(.5, 12, 12) is " + result);
		
		// Inverse Beta
		x = .5;
		p = 12;
		q = 12;
		result = Cdf.InverseBeta(x, p, q);
		Console.Out.WriteLine("inversebeta(.5, 12, 12) is " + result);
		
		// binomial
		k = 3;
		n = 5;
		prob = .95;
		result = Cdf.Binomial(k, n, prob);
		Console.Out.WriteLine("binomial(3, 5, .95) is " + result);
		
		// Chi
		x = .15;
		n = 2;
		result = Cdf.Chi(x, n);
		Console.Out.WriteLine("chi(.15, 2) is " + result);
		
		// Inverse Chi
		prob = .99;
		n = 2;
		result = Cdf.InverseChi(prob, n);
		Console.Out.WriteLine("inverseChi(.99, 2) is " + result);
	}
}

Output

beta(.5, 12, 12) is 0.500000000000002
inversebeta(.5, 12, 12) is 0.5
binomial(3, 5, .95) is 0.0225925
chi(.15, 2) is 0.0722565136714471
inverseChi(.99, 2) is 9.21034037197624