Example usage for org.apache.commons.math.distribution PoissonDistribution inverseCumulativeProbability

Introduction

In this page you can find the example usage for org.apache.commons.math.distribution PoissonDistribution inverseCumulativeProbability.

Prototype

int inverseCumulativeProbability(double p) throws MathException;

Source Link

Document

For this distribution, X, this method returns the largest x such that P(X ≤ x) <= p.

Usage

From source file:geogebra.kernel.statistics.AlgoInversePoisson.java

protected final void compute() {

    if (input[0].isDefined() && input[1].isDefined()) {
        double param = a.getDouble();
        double val = b.getDouble();
        try {/* w ww . jav a 2  s.c om*/
            PoissonDistribution dist = getPoissonDistribution(param);

            double result = dist.inverseCumulativeProbability(val);

            // eg InversePascal[1,1,1] returns 2147483647
            if (result >= Integer.MAX_VALUE)
                num.setUndefined();
            else
                num.setValue(result + 1);

        } catch (Exception e) {
            num.setUndefined();
        }
    } else
        num.setUndefined();
}

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From source file:geogebra.common.kernel.statistics.AlgoInversePoisson.java

@Override
public final void compute() {

    if (input[0].isDefined() && input[1].isDefined()) {
        double param = a.getDouble();
        double val = b.getDouble();
        try {// w w  w.  ja v a 2 s.  c o  m
            PoissonDistribution dist = getPoissonDistribution(param);

            double result = dist.inverseCumulativeProbability(val);

            // eg InversePascal[1,1,1] returns 2147483647
            if (result >= Integer.MAX_VALUE)
                num.setUndefined();
            else
                num.setValue(result + 1);

        } catch (Exception e) {
            num.setUndefined();
        }
    } else
        num.setUndefined();
}

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