Example usage for org.apache.commons.math.distribution TDistributionImpl density

Introduction

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

Prototype

@Override
public double density(double x) 

Source Link

Document

Returns the probability density for a particular point.

Usage

From source file:dr.evomodel.epidemiology.casetocase.periodpriors.NormalPeriodPriorDistribution.java

public double calculateLogPosteriorPredictiveProbability(double value) {
    double mean = currentParameters[0];
    double sd = Math.sqrt(
            currentParameters[3] * (currentParameters[1] + 1) / (currentParameters[2] * currentParameters[1]));
    double scaledValue = (value - mean) / sd;
    double out;/*from   ww w .j  ava 2 s  .  co m*/

    if (2 * currentParameters[2] <= normalApproximationThreshold) {
        TDistributionImpl tDist = new TDistributionImpl(2 * currentParameters[2]);

        out = Math.log(tDist.density(scaledValue));

    } else {

        out = NormalDistribution.logPdf(scaledValue, 0, 1);

    }

    return out;
}

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From source file:org.caleydo.view.tourguide.impl.PAGEAlgorithm.java

@Override
protected float computePValueImpl(Set<Integer> geneSet, IProgressMonitor monitor) {
    float z = compute(geneSet, monitor);
    if (Float.isNaN(z))
        return Float.NaN;
    int m = Sets.intersection(foldChanges.keySet(), geneSet).size();
    if (m == 0)/*w  w w  .  ja  va2s. c  o  m*/
        return Float.NaN;
    TDistributionImpl t = new TDistributionImpl(m);
    float pValue = (float) t.density(z);
    return pValue;
}

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