Example usage for org.apache.commons.math3.analysis.interpolation NevilleInterpolator NevilleInterpolator

Introduction

In this page you can find the example usage for org.apache.commons.math3.analysis.interpolation NevilleInterpolator NevilleInterpolator.

Prototype

NevilleInterpolator

Source Link

Usage

From source file:org.lightjason.agentspeak.action.builtin.TestCActionMathInterpolate.java

/**
 * test multiple interpolate/*from  w  ww. ja v a 2s  .c o m*/
 */
@Test
public final void multipleinterpolate() {
    final List<ITerm> l_return = new ArrayList<>();

    new CMultipleInterpolate()
            .execute(false, IContext.EMPTYPLAN, Stream
                    .of(5, new LinearInterpolator().interpolate(new double[] { 3, 6 }, new double[] { 11, 13 }),
                            new NevilleInterpolator().interpolate(new double[] { 2, 3, 8 },
                                    new double[] { 11, 13, 20 }))
                    .map(CRawTerm::from).collect(Collectors.toList()), l_return);

    Assert.assertEquals(l_return.size(), 2);
    Assert.assertEquals(l_return.get(0).<Number>raw(), 12.333333333333334);
    Assert.assertEquals(l_return.get(1).<Number>raw(), 16.400000000000002);
}

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From source file:org.meteoinfo.math.interpolate.InterpUtil.java

/**
 * Make interpolation function// w  w w  .j  a v a2 s .  c o  m
 * @param x X data
 * @param y Y data
 * @param kind Specifies the kind of interpolation as a string (linear, 'spline').
 * @return Interpolation function
 */
public static UnivariateFunction getInterpFunc(Array x, Array y, String kind) {
    double[] xd = (double[]) ArrayUtil.copyToNDJavaArray(x);
    double[] yd = (double[]) ArrayUtil.copyToNDJavaArray(y);
    UnivariateInterpolator li;
    switch (kind) {
    case "spline":
    case "cubic":
        li = new SplineInterpolator();
        break;
    case "akima":
        li = new AkimaSplineInterpolator();
        break;
    case "divided":
        li = new DividedDifferenceInterpolator();
        break;
    case "loess":
        li = new LoessInterpolator();
        break;
    case "neville":
        li = new NevilleInterpolator();
        break;
    default:
        li = new LinearInterpolator();
        break;
    }
    UnivariateFunction psf = li.interpolate(xd, yd);

    return psf;
}

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