Example usage for jdk.nashorn.internal.objects Global Infinity

Introduction

In this page you can find the example usage for jdk.nashorn.internal.objects Global Infinity.

Prototype

double Infinity

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Document

Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity

Usage

From source file:HillClimbing.HCIndividual.java

public void evolve() {

    Function f = ((HCPopulation) this.getPopulation()).getFunction();

    double currentPoint[] = this.getX();

    double stepSize[] = new double[currentPoint.length];
    Arrays.fill(stepSize, random.nextGaussian() + 1);

    double acc = random.nextGaussian() + 1.2;

    double candidate[] = new double[5];

    candidate[0] = -acc;/*from  ww  w  . j a  va2  s .  c  o m*/
    candidate[1] = -1 / acc;
    candidate[2] = 0;
    candidate[3] = 1 / acc;
    candidate[4] = acc;

    double before = f.calculate(this.getX());

    for (int i = 0; i < currentPoint.length; i++) {

        int best = 1;
        double bestScore = Global.Infinity;

        for (int j = 0; j < 4; j++) {

            currentPoint[i] = currentPoint[i] + stepSize[i] * candidate[j];
            double temp = f.calculate(currentPoint);
            currentPoint[i] = currentPoint[i] - stepSize[i] * candidate[j];
            if (temp < bestScore) {
                bestScore = temp;
                best = j;
            }
        }

        if (candidate[best] == 0) {
            stepSize[i] = stepSize[i] / acc;
        } else {
            currentPoint[i] = currentPoint[i] + stepSize[i] * candidate[best];
            stepSize[i] = stepSize[i] * candidate[best]; // accelerate
        }
    }

    if (f.calculate(currentPoint) < before)
        this.setX(currentPoint);

}

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From source file:MathExt.Ext.java

private static double gamma(double z) {
    if (z > 150) {
        return Global.Infinity;
    }//ww  w .  ja  v a  2 s  .co m

    if (z < 0.5) {
        return Math.PI / (Math.sin(Math.PI * z) * gamma(1 - z));
    } else {
        z -= 1;

        double x = C[0];
        for (int i = 1; i < g + 2; i++)
            x += C[i] / (z + i);

        double t = z + g + 0.5;
        return Math.sqrt(2 * Math.PI) * Math.pow(t, (z + 0.5)) * Math.exp(-t) * x;
    }
}

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