Example usage for org.apache.commons.math.random Well19937c Well19937c

Introduction

In this page you can find the example usage for org.apache.commons.math.random Well19937c Well19937c.

Prototype

public Well19937c() 

Source Link

Document

Creates a new random number generator.

Usage

From source file:com.milaboratory.util.MathTest.java

@Test
public void testBinomialLog() throws Exception {
    RandomData rdg = new RandomDataImpl(new Well19937c());
    long n, k;//from w w w . ja  va  2  s.c  o  m
    double func, exact, avrg;
    for (int i = 0; i < 100000; ++i) {
        n = rdg.nextLong(1, 100);
        k = rdg.nextLong(0, n);
        func = Math.binomialCoefficientLog(n, k);
        exact = exactBinomialCoefficientLog(n, k);
        avrg = (func + exact) / 2;
        assertTrue(func == exact || (java.lang.Math.abs(func - exact) / avrg) <= .001);
    }
}

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From source file:com.milaboratory.util.MathTest.java

@Test
public void testBinomialLogBig() throws Exception {
    RandomData rdg = new RandomDataImpl(new Well19937c());
    long n, k;/*from w w w  .java 2s . c  om*/
    double func, exact, avrg;
    for (int i = 0; i < 5000; ++i) {
        n = rdg.nextLong(1, 10000);
        k = rdg.nextLong(0, n);
        func = Math.binomialCoefficientLog(n, k);
        exact = exactBinomialCoefficientLog(n, k);
        avrg = (func + exact) / 2;
        assertTrue(func == exact || (java.lang.Math.abs(func - exact) / avrg) <= .001);
    }
}

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