Example usage for org.apache.commons.math3.analysis FunctionUtils sample

Introduction

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

Prototype

public static double[] sample(UnivariateFunction f, double min, double max, int n) 

Source Link

Document

Samples the specified univariate real function on the specified interval.

Usage

From source file:experiment.FastCosineTransformer_bug.java

/**
 * {@inheritDoc}//from  w  w w.  j  av a 2 s . co m
 *
 * @throws org.apache.commons.math3.exception.NonMonotonicSequenceException
 * if the lower bound is greater than, or equal to the upper bound
 * @throws org.apache.commons.math3.exception.NotStrictlyPositiveException
 * if the number of sample points is negative
 * @throws MathIllegalArgumentException if the number of sample points is
 * not a power of two plus one
 */
public double[] transform(final UnivariateFunction f, final double min, final double max, final int n,
        final TransformType type) throws MathIllegalArgumentException {

    final double[] data = FunctionUtils.sample(f, min, max, n);
    return transform(data, type);
}

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From source file:experiment.FastSineTransformer_bug.java

/**
 * {@inheritDoc}// w ww . ja va2  s  . co  m
 *
 * This implementation enforces {@code f(x) = 0.0} at {@code x = 0.0}.
 *
 * @throws org.apache.commons.math3.exception.NonMonotonicSequenceException
 *   if the lower bound is greater than, or equal to the upper bound
 * @throws org.apache.commons.math3.exception.NotStrictlyPositiveException
 *   if the number of sample points is negative
 * @throws MathIllegalArgumentException if the number of sample points is not a power of two
 */
public double[] transform(final UnivariateFunction f, final double min, final double max, final int n,
        final TransformType type) {

    final double[] data = FunctionUtils.sample(f, min, max, n);
    data[0] = 0.0;
    return transform(data, type);
}

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