Example usage for org.apache.commons.math.stat StatUtils geometricMean

Introduction

In this page you can find the example usage for org.apache.commons.math.stat StatUtils geometricMean.

Prototype

public static double geometricMean(final double[] values) 

Source Link

Document

Returns the geometric mean of the entries in the input array, or Double.NaN if the array is empty.

Usage

From source file:playground.johannes.socialnetworks.snowball2.sim.deprecated.Estimator2.java

@Override
public void update(SampledGraph graph) {
    stats = new SampleStats(graph);

    TIntObjectHashMap<TIntArrayList> tmp = new TIntObjectHashMap<TIntArrayList>();

    for (Vertex vertex : graph.getVertices()) {
        if (((SampledVertex) vertex).isSampled()) {
            int k = vertex.getNeighbours().size();
            TIntArrayList values = tmp.get(k);
            if (values == null) {
                values = new TIntArrayList();
                tmp.put(k, values);//from www  .  jav a  2 s .  c o m
            }
            for (Vertex neighbor : vertex.getNeighbours()) {
                if (((SampledVertex) neighbor).isSampled()) {
                    values.add(neighbor.getNeighbours().size());
                }
            }
        }
    }

    kMap = new TIntDoubleHashMap();
    TIntObjectIterator<TIntArrayList> it = tmp.iterator();
    for (int i = 0; i < tmp.size(); i++) {
        it.advance();
        TIntArrayList list = it.value();
        double[] dList = new double[list.size()];
        for (int k = 0; k < list.size(); k++)
            dList[k] = list.get(k);
        kMap.put(it.key(), StatUtils.geometricMean(dList));
    }
}

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