Examples of UnivariateFunction

org.apache.commons.math3.analysis.UnivariateFunction
x value that caused the problem. private final double x; public LocalException(double x) { this.x = x; } public double getX() { return x; } } private static class MyFunction implements UnivariateFunction { public double value(double x) { double y = hugeFormula(x); if (somethingBadHappens) { throw new LocalException(x); } return y; } } public void compute() { try { solver.solve(maxEval, new MyFunction(a, b, c), min, max); } catch (LocalException le) { // Retrieve the x value. } } As shown, the exception is local to the user's code and it is guaranteed that Apache Commons Math will not catch it.

Examples of org.apache.commons.math3.analysis.UnivariateFunction

    }




    @Test
    public void testInverse() {
        final UnivariateFunction inv = new Inverse();
        final UnivariateFunction log = new Log();


        final double lo = 12.34;
        final double hi = 456.78;


        final GaussIntegrator integrator = factory.legendreHighPrecision(60, lo, hi);
        final double s = integrator.integrate(inv);
        final double expected = log.value(hi) - log.value(lo);
        // System.out.println("s=" + s + " e=" + expected);
        Assert.assertEquals(expected, s, 1e-15);
    }

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Examples of org.apache.commons.math3.analysis.UnivariateFunction


        final GaussIntegrator integrator
            = new GaussIntegrator(new Pair<double[], double[]>(points, weights));


        final double val = 123.456;
        final UnivariateFunction c = new Constant(val);


        final double s = integrator.integrate(c);
        Assert.assertEquals(points.length * val, s, 0d);
    }

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

public class LegendreTest {
    private static final GaussIntegratorFactory factory = new GaussIntegratorFactory();


    @Test
    public void testCos() {
        final UnivariateFunction cos = new Cos();


        final GaussIntegrator integrator = factory.legendre(7, 0, Math.PI / 2);
        final double s = integrator.integrate(cos);
        // System.out.println("s=" + s + " e=" + 1);
        Assert.assertEquals(1, s, Math.ulp(1d));

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

    }




    @Test
    public void testInverse() {
        final UnivariateFunction inv = new Inverse();
        final UnivariateFunction log = new Log();


        final double lo = 12.34;
        final double hi = 456.78;


        final GaussIntegrator integrator = factory.legendre(60, lo, hi);
        final double s = integrator.integrate(inv);
        final double expected = log.value(hi) - log.value(lo);
        // System.out.println("s=" + s + " e=" + expected);
        Assert.assertEquals(expected, s, 1e-14);
    }

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

     * if the number of evaluations is exceeded.
     */
    public UnivariatePointValuePair search(final double[] startPoint,
                                           final double[] direction) {
        final int n = startPoint.length;
        final UnivariateFunction f = new UnivariateFunction() {
                public double value(double alpha) {
                    final double[] x = new double[n];
                    for (int i = 0; i < n; i++) {
                        x[i] = startPoint[i] + alpha * direction[i];
                    }

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

         * @throws org.apache.commons.math3.exception.TooManyEvaluationsException
         * if the number of evaluations is exceeded.
         */
        public UnivariatePointValuePair search(final double[] p, final double[] d) {
            final int n = p.length;
            final UnivariateFunction f = new UnivariateFunction() {
                    public double value(double alpha) {
                        final double[] x = new double[n];
                        for (int i = 0; i < n; i++) {
                            x[i] = p[i] + alpha * d[i];
                        }

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

    }


    @Test
    public void testTransformFunctionSizeNotAPowerOfTwo() {
        final int n = 127;
        final UnivariateFunction f = new Sin();
        final DftNormalization[] norm;
        norm = DftNormalization.values();
        final TransformType[] type;
        type = TransformType.values();
        for (int i = 0; i < norm.length; i++) {

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

    }


    @Test
    public void testTransformFunctionNotStrictlyPositiveNumberOfSamples() {
        final int n = -128;
        final UnivariateFunction f = new Sin();
        final DftNormalization[] norm;
        norm = DftNormalization.values();
        final TransformType[] type;
        type = TransformType.values();
        for (int i = 0; i < norm.length; i++) {

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

    }


    @Test
    public void testTransformFunctionInvalidBounds() {
        final int n = 128;
        final UnivariateFunction f = new Sin();
        final DftNormalization[] norm;
        norm = DftNormalization.values();
        final TransformType[] type;
        type = TransformType.values();
        for (int i = 0; i < norm.length; i++) {

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Examples of org.apache.commons.math3.analysis.UnivariateFunction

        }
    }


    @Test
    public void testStandardTransformFunction() {
        final UnivariateFunction f = new Sinc();
        final double min = -FastMath.PI;
        final double max = FastMath.PI;
        final DftNormalization[] norm;
        norm = DftNormalization.values();
        final TransformType[] type;

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