Example usage for org.apache.commons.math.analysis PolynomialFunction polynomialDerivative

Introduction

In this page you can find the example usage for org.apache.commons.math.analysis PolynomialFunction polynomialDerivative.

Prototype

public PolynomialFunction polynomialDerivative() 

Source Link

Document

Returns the derivative as a PolynomialRealFunction

Usage

From source file:org.jcurl.math.analysis.PolynomeTest.java

public void testCompare() throws FunctionEvaluationException {
    final double[] coeff = { 1.1, 1.2, 1.3 };
    final double[] points = { -1.1, -1, 0, 1, 1.1, 100 };
    final PolynomialFunction pa = new PolynomialFunction(coeff);
    final Polynome pj = new Polynome(coeff);
    for (int i = points.length - 1; i >= 0; i--)
        assertEquals("", pa.value(points[i]), pj.value(points[i]), 1e-11);

    final PolynomialFunction pa1 = pa.polynomialDerivative();
    for (int i = points.length - 1; i >= 0; i--)
        assertEquals("", pa1.value(points[i]), pj.getC(1, points[i]), 1e-11);

    final PolynomialFunction pa2 = pa1.polynomialDerivative();
    for (int i = points.length - 1; i >= 0; i--)
        assertEquals("", pa2.value(points[i]), pj.getC(2, points[i]), 1e-11);

    final PolynomialFunction pj1 = pj.polynomialDerivative();
    for (int i = points.length - 1; i >= 0; i--)
        assertEquals("", pj1.value(points[i]), pj.getC(1, points[i]), 1e-11);

    final PolynomialFunction pj2 = pj1.polynomialDerivative();
    for (int i = points.length - 1; i >= 0; i--)
        assertEquals("", pj2.value(points[i]), pj.getC(2, points[i]), 1e-11);
}

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