Example usage for org.apache.mahout.math DenseVector clone

Introduction

In this page you can find the example usage for org.apache.mahout.math DenseVector clone.

Prototype

@SuppressWarnings("CloneDoesntCallSuperClone")
    @Override
    public DenseVector clone() 

Source Link

Usage

From source file:root.hap.availability.AvailabilityReducer.java

License:Apache License

private void updateAvailability(Context context, DenseVector A, DenseVector R, DenseVector S, DenseVector P,
        DenseVector C, int reducerColNum, int reducerLevelNum, int N, String availability)
        throws IOException, InterruptedException {

    DenseVector oldA = A.clone();

    // get positive values into RPositive
    DenseVector RPositive = R.clone();// w  w w .j ava2  s  .  c o  m
    for (int rowNum = 0; rowNum < N; rowNum++) {
        double RValue = RPositive.get(rowNum);
        if (RValue < 0) {
            RPositive.setQuick(rowNum, 0);
        }
    }

    // reset diagonal value from R
    RPositive.setQuick(reducerColNum, R.get(reducerColNum));

    // sum R Positive values
    double RPSum = RPositive.zSum();

    double CVal = C.get(0);
    double PVal = P.get(0);

    double CHat = CVal + PVal;

    // sum together CHat and RPSum into a vector
    A.assign(CHat + RPSum);

    A = (DenseVector) A.minus(RPositive);

    for (int rowNum = 0; rowNum < N; rowNum++) {

        if (rowNum == reducerColNum) {
            continue;
        }

        double value = A.get(rowNum) < 0 ? A.get(rowNum) : 0;

        A.setQuick(rowNum, value);
    }

    double lambda = context.getConfiguration().getFloat("lambda", 0);
    A = (DenseVector) A.times(1 - lambda);
    oldA = (DenseVector) oldA.times(lambda);
    A = (DenseVector) A.plus(oldA);

    VectorWritable AWritable = new VectorWritable(A);

    context.write(new Text(reducerColNum + "\t" + reducerLevelNum + "\t" + availability), AWritable);

}

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From source file:root.hap.responsibility.ResponsibilityReducer.java

License:Apache License

private void updateResponsibility(Context context, DenseVector A, DenseVector S, DenseVector R, DenseVector T,
        int reducerLevelNum, int reducerRowNum, int N, String responsibilty)
        throws IOException, InterruptedException {

    DenseVector oldR = R.clone();
    DenseVector sum = (DenseVector) A.plus(S);

    double maxValue = sum.maxValue();
    int maxValueIndex = sum.maxValueIndex();
    maxValue *= -1;//from w w w  .  java 2  s.c  o m

    sum.set(maxValueIndex, Double.NEGATIVE_INFINITY);

    double tau = T.get(0);

    double YH = Math.min(maxValue, tau);

    double actualMax = sum.maxValue();
    actualMax *= -1;

    double YH2 = Math.min(actualMax, tau);

    R = (DenseVector) S.plus(YH);
    R.setQuick(maxValueIndex, S.get(maxValueIndex) + YH2);

    // Dampen
    double lambda = context.getConfiguration().getFloat("lambda", 0);
    R = (DenseVector) R.times(1 - lambda);
    oldR = (DenseVector) oldR.times(lambda);
    R = (DenseVector) R.plus(oldR);

    VectorWritable RWritable = new VectorWritable(R);

    context.write(new Text(reducerRowNum + "\t" + reducerLevelNum + "\t" + responsibilty), RWritable);

}

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