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

Introduction

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

Prototype

double probability(int x);

Source Link

Document

For a random variable X whose values are distributed according to this distribution, this method returns P(X = x).

Usage

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

@SuppressWarnings("deprecation")
protected final void compute() {

    if (input[0].isDefined() && input[1].isDefined() && input[2].isDefined()) {
        double param = a.getDouble();
        double val = b.getDouble();
        try {//from  w w  w.j  a v  a2s . c  om
            PoissonDistribution dist = getPoissonDistribution(param);
            if (isCumulative.getBoolean())
                num.setValue(dist.cumulativeProbability(val)); // P(X <= val)
            else
                num.setValue(dist.probability(val)); // P(X = val)
        } catch (Exception e) {
            Application.debug(e.getMessage());
            num.setUndefined();
        }
    } else
        num.setUndefined();
}

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

@Override
@SuppressWarnings("deprecation")
public final void compute() {

    if (input[0].isDefined() && input[1].isDefined() && input[2].isDefined()) {
        double param = a.getDouble();
        double val = b.getDouble();
        try {/* www .  j a v a 2  s. co m*/
            PoissonDistribution dist = getPoissonDistribution(param);
            if (isCumulative.getBoolean())
                num.setValue(dist.cumulativeProbability(val)); // P(X <=
            // val)
            else
                num.setValue(dist.probability(val)); // P(X = val)
        } catch (Exception e) {
            App.debug(e.getMessage());
            num.setUndefined();
        }
    } else
        num.setUndefined();
}

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From source file:org.apache.mahout.knn.generate.PoissonSamplerTest.java

private void checkDistribution(PoissonSampler pd, double alpha) {
    int[] count = new int[(int) Math.max(10, 5 * alpha)];
    for (int i = 0; i < 10000; i++) {
        count[pd.sample().intValue()]++;
    }/*from  ww  w  .j av  a 2 s  .  c o m*/

    PoissonDistribution ref = new PoissonDistributionImpl(alpha);
    for (int i = 0; i < count.length; i++) {
        assertEquals(ref.probability(i), count[i] / 10000.0, 2e-2);
    }
}

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From source file:org.geogebra.common.kernel.statistics.AlgoPoisson.java

@Override
public final void compute() {

    if (input[0].isDefined() && input[1].isDefined() && input[2].isDefined()) {
        double param = a.getDouble();
        double val = b.getDouble();
        try {/*from   w  w  w . jav  a2 s  .c  om*/
            PoissonDistribution dist = getPoissonDistribution(param);
            if (isCumulative.getBoolean())
                num.setValue(dist.cumulativeProbability(val)); // P(X <=
            // val)
            else
                num.setValue(dist.probability(val)); // P(X = val)
        } catch (Exception e) {
            App.debug(e.getMessage());
            num.setUndefined();
        }
    } else
        num.setUndefined();
}

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