Example usage for org.apache.commons.math3.optim PointValuePair PointValuePair

Introduction

In this page you can find the example usage for org.apache.commons.math3.optim PointValuePair PointValuePair.

Prototype

public PointValuePair(final double[] point, final double value, final boolean copyArray) 

Source Link

Document

Builds a point/objective function value pair.

Usage

From source file:com.wwidesigner.math.DIRECTOptimizer.java

/** {@inheritDoc} */
@Override/* w w  w.  ja v a  2  s  . c om*/
protected PointValuePair doOptimize() {
    currentBest = new PointValuePair(getStartPoint(), Double.MAX_VALUE, true);
    iterationOfLastImprovement = 0;
    int nrPromising;

    // Validity checks.
    setup();

    double convergenceDiameter = thresholdDiameter(convergenceXThreshold, boundDifference.length);

    do {
        incrementIterationCount();
        nrPromising = dividePotentiallyOptimal(convergenceDiameter);
    } while (!hasConverged(nrPromising));

    if (getGoalType() == GoalType.MAXIMIZE) {
        return new PointValuePair(currentBest.getPoint(), -currentBest.getValue());
    }

    return currentBest;
}

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From source file:com.wwidesigner.math.DIRECTOptimizer.java

/** {@inheritDoc} */
@Override//from  w  w  w .j  a  v a  2s.  c o  m
public double computeObjectiveValue(double[] params) {
    double fval;
    try {
        fval = super.computeObjectiveValue(params);
        if (getGoalType() == GoalType.MAXIMIZE) {
            fval = -fval;
        }
        if (fval < currentBest.getValue()) {
            currentBest = new PointValuePair(params, fval, true);
            iterationOfLastImprovement = getIterations();
        }
        if (fval > fMax) {
            fMax = fval;
        }
    } catch (NoSuchElementException e) {
        fval = fMax;
    }
    return fval;
}

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