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

Introduction

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

Prototype

@Override
public double density(double x) 

Source Link

Document

Returns the probability density for a particular point.

Usage

From source file:org.dutir.lucene.util.Distance.java

/**
 * /*from   w ww  .  j a  va2  s. c o m*/
 * @param positionOfTerm1
 * @param positionOfTerm2
 * @return
 */
public static double unorderGaussianTimes(final int[] positionOfTerm1, final int[] positionOfTerm2,
        NormalDistributionImpl nDist) {
    double retValue = 0;
    if (positionOfTerm1 == null || positionOfTerm2 == null) {
        return 0;
    }
    for (int i = 0; i < positionOfTerm1.length; i++) {
        for (int j = 0; j < positionOfTerm2.length; j++) {
            double dist = nDist.density(Math.abs(positionOfTerm1[i] - positionOfTerm2[j]));
            if (dist > 0) {
                retValue += dist;
            }
        }
    }
    return retValue;
}

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From source file:org.dutir.lucene.util.Distance.java

/**
 * //w w  w .  j a  va  2 s  .co m
 * @param positionOfTerm1
 * @param positionOfTerm2
 * @param winSize can exceed the size the the documents
 * @return
 */
public static double unorderGaussianTimes(final int[] positionOfTerm1, final int[] positionOfTerm2,
        final int winSize, NormalDistributionImpl nDist) {
    double retValue = 0;
    if (positionOfTerm1 == null || positionOfTerm2 == null) {
        return 0;
    }
    for (int i = 0; i < positionOfTerm1.length; i++) {
        for (int j = 0; j < positionOfTerm2.length; j++) {
            double tmp = Math.abs(positionOfTerm1[i] - positionOfTerm2[j]);
            double dist = nDist.density(tmp);
            if (dist > 0 && tmp < winSize) {
                retValue += dist;
            } else {
                //               System.out.println(tmp +":" + dist);
            }

        }
    }
    return retValue;
}

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