Package org.apache.commons.math3.analysis.function

Class HarmonicOscillator.Parametric

java.lang.Object

org.apache.commons.math3.analysis.function.HarmonicOscillator.Parametric

All Implemented Interfaces:

ParametricUnivariateFunction

Enclosing class:

HarmonicOscillator

public static class HarmonicOscillator.Parametric
extends java.lang.Object
implements ParametricUnivariateFunction

Parametric function where the input array contains the parameters of the harmonic oscillator function, ordered as follows:

• Amplitude
• Angular frequency
• Phase

Constructor Summary

Constructors

Constructor	Description
Parametric()

Method Summary

Modifier and Type	Method	Description
double[]	gradient(double x, double... param)	Computes the value of the gradient at x.
private void	validateParameters(double[] param)	Validates parameters to ensure they are appropriate for the evaluation of the value(double,double[]) and gradient(double,double[]) methods.
double	value(double x, double... param)	Computes the value of the harmonic oscillator at x.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Parametric

public Parametric()

Method Detail

value

public double value(double x,
                    double... param)
             throws NullArgumentException,
                    DimensionMismatchException

Computes the value of the harmonic oscillator at x.

Specified by:

value in interface ParametricUnivariateFunction

Parameters:

x - Value for which the function must be computed.

param - Values of norm, mean and standard deviation.

Returns:

the value of the function.

Throws:

NullArgumentException - if param is null.

DimensionMismatchException - if the size of param is not 3.

gradient

public double[] gradient(double x,
                         double... param)
                  throws NullArgumentException,
                         DimensionMismatchException

Computes the value of the gradient at x. The components of the gradient vector are the partial derivatives of the function with respect to each of the parameters (amplitude, angular frequency and phase).

Specified by:

gradient in interface ParametricUnivariateFunction

Parameters:

x - Value at which the gradient must be computed.

param - Values of amplitude, angular frequency and phase.

Returns:

the gradient vector at x.

Throws:

NullArgumentException - if param is null.

DimensionMismatchException - if the size of param is not 3.

validateParameters

private void validateParameters(double[] param)
                         throws NullArgumentException,
                                DimensionMismatchException

Validates parameters to ensure they are appropriate for the evaluation of the value(double,double[]) and gradient(double,double[]) methods.

Parameters:

param - Values of norm, mean and standard deviation.

Throws:

NullArgumentException - if param is null.

DimensionMismatchException - if the size of param is not 3.