Example usage for org.apache.commons.math3.optimization.fitting CurveFitter fit

Introduction

In this page you can find the example usage for org.apache.commons.math3.optimization.fitting CurveFitter fit.

Prototype

public double[] fit(T f, final double[] initialGuess) 

Source Link

Document

Fit a curve.

Usage

From source file:org.knime.knip.suise.node.boundarymodel.contourdata.ContourDataFromCRF.java

private double[] fitFunction(double[] approx, ParametricUnivariateFunction function, int numParam) {
    CurveFitter fitter = new CurveFitter(new LevenbergMarquardtOptimizer());
    // CurveFitter fitter = new CurveFitter(new GaussNewtonOptimizer());
    double x;//from   w  w w .j  a  v a  2s  . com
    double y;
    for (int i = 0; i < approx.length; i++) {
        if (approx[i] > 0) {
            x = i / contourDataGrid().width();
            x = x / contourDataGrid().totalLength() * 2 * Math.PI - Math.PI;
            y = i % contourDataGrid().width() - CENTER_COL;
            fitter.addObservedPoint(approx[i], x, y);
        }

    }

    return fitter.fit(function, new double[numParam]);

}

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