Examples of UnivariateDifferentiableFunction

org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction
Interface for univariate functions derivatives.
This interface represents a simple function which computes both the value and the first derivative of a mathematical function. The derivative is computed with respect to the input variable.
@see UnivariateDifferentiableFunction @see UnivariateFunctionDifferentiator @since 3.1

Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @param f List of functions.
     * @return the composite function.
     * @since 3.1
     */
    public static UnivariateDifferentiableFunction compose(final UnivariateDifferentiableFunction ... f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double t) {
                double r = t;
                for (int i = f.length - 1; i >= 0; i--) {

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @param f List of functions.
     * @return a function that computes the sum of the functions.
     * @since 3.1
     */
    public static UnivariateDifferentiableFunction add(final UnivariateDifferentiableFunction ... f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double t) {
                double r = f[0].value(t);
                for (int i = 1; i < f.length; i++) {

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @param f List of functions.
     * @return a function that computes the product of the functions.
     * @since 3.1
     */
    public static UnivariateDifferentiableFunction multiply(final UnivariateDifferentiableFunction ... f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double t) {
                double r = f[0].value(t);
                for (int i = 1; i < f.length; i++) {

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @deprecated this conversion method is temporary in version 3.1, as the {@link
     * DifferentiableUnivariateFunction} interface itself is deprecated
     */
    @Deprecated
    public static UnivariateDifferentiableFunction toUnivariateDifferential(final DifferentiableUnivariateFunction f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double x) {
                return f.value(x);
            }

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

    /**
     *
     */
    @Test
    public void testSinZero() {
        UnivariateDifferentiableFunction f = new Sin();
        double result;


        NewtonRaphsonSolver solver = new NewtonRaphsonSolver();
        result = solver.solve(100, f, 3, 4);
        Assert.assertEquals(result, FastMath.PI, solver.getAbsoluteAccuracy());

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

    /**
     *
     */
    @Test
    public void testQuinticZero() {
        final UnivariateDifferentiableFunction f = new QuinticFunction();
        double result;


        NewtonRaphsonSolver solver = new NewtonRaphsonSolver();
        result = solver.solve(100, f, -0.2, 0.2);
        Assert.assertEquals(result, 0, solver.getAbsoluteAccuracy());

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

    /**
     *
     */
    @Test
    public void testQuinticZero() {
        final UnivariateDifferentiableFunction q = new QuinticFunction();
        DifferentiableUnivariateFunction f = new DifferentiableUnivariateFunction() {


            public double value(double x) {
                return q.value(x);
            }


            public UnivariateFunction derivative() {
                return new UnivariateFunction() {
                    public double value(double x) {
                        return q.value(new DerivativeStructure(1, 1, 0, x)).getPartialDerivative(1);
                    }
                };
            }


        };

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Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @param f List of functions.
     * @return the composite function.
     * @since 3.1
     */
    public static UnivariateDifferentiableFunction compose(final UnivariateDifferentiableFunction ... f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double t) {
                double r = t;
                for (int i = f.length - 1; i >= 0; i--) {

View Full Code Here

Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @param f List of functions.
     * @return a function that computes the sum of the functions.
     * @since 3.1
     */
    public static UnivariateDifferentiableFunction add(final UnivariateDifferentiableFunction ... f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double t) {
                double r = f[0].value(t);
                for (int i = 1; i < f.length; i++) {

View Full Code Here

Examples of org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction

     * @param f List of functions.
     * @return a function that computes the product of the functions.
     * @since 3.1
     */
    public static UnivariateDifferentiableFunction multiply(final UnivariateDifferentiableFunction ... f) {
        return new UnivariateDifferentiableFunction() {


            /** {@inheritDoc} */
            public double value(final double t) {
                double r = f[0].value(t);
                for (int i = 1; i < f.length; i++) {

View Full Code Here

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