package com.imsl.test.example.math;

import com.imsl.math.*;

/**
 * <p>
 * Calculates various special functions.</p>
 *
 * Various special functions are exercised. Their use in this example typifies
 * the manner in which other special functions in the Sfun class would be used.
 *
 * @see <a href="SfunEx1.java">Code</a>
 * @see <a href="doc-files/SfunEx1.out">Output</a>
 */
public class SfunEx1 {

    public static void main(String args[]) {
        double result;

        // Log base 10 of x
        double x = 100.;
        result = Sfun.log10(x);
        System.out.println("The log base 10 of 100. is " + result);

        // Factorial of 10
        int n = 10;
        result = Sfun.fact(n);
        System.out.println("10 factorial is " + result);

        // Gamma of 5.0
        double x1 = 5.;
        result = Sfun.gamma(x1);
        System.out.println("The Gamma function at 5.0 is " + result);

        // LogGamma of 1.85
        double x2 = 1.85;
        result = Sfun.logGamma(x2);
        System.out.println("The logarithm of the absolute value of the "
                + "Gamma function \n    at 1.85 is " + result);

        // Beta of (2.2, 3.7)
        double a = 2.2;
        double b = 3.7;
        result = Sfun.beta(a, b);
        System.out.println("Beta(2.2, 3.7) is " + result);

        // LogBeta of (2.2, 3.7)
        double a1 = 2.2;
        double b1 = 3.7;
        result = Sfun.logBeta(a1, b1);
        System.out.println("logBeta(2.2, 3.7) is " + result);
    }
}