org.apache.commons.math3.analysis.function

Class HarmonicOscillator

java.lang.Object

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

All Implemented Interfaces:

DifferentiableUnivariateFunction, UnivariateDifferentiableFunction, UnivariateFunction

public class HarmonicOscillator
extends java.lang.Object
implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction

simple harmonic oscillator function.

Since:

3.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HarmonicOscillator.Parametric Parametric function where the input array contains the parameters of the harmonic oscillator function, ordered as follows: Amplitude Angular frequency Phase

Field Summary

Fields

Modifier and Type	Field and Description
private double	amplitude Amplitude.
private double	omega Angular frequency.
private double	phase Phase.

Constructor Summary

Constructors

Constructor and Description
HarmonicOscillator(double amplitude, double omega, double phase) Harmonic oscillator function.

Method Summary

Methods

Modifier and Type	Method and Description
UnivariateFunction	derivative() Deprecated. as of 3.1, replaced by value(DerivativeStructure)
DerivativeStructure	value(DerivativeStructure t) Simple mathematical function.
double	value(double x) Compute the value of the function.
private static double	value(double xTimesOmegaPlusPhase, double amplitude)

Methods inherited from class java.lang.Object

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

Field Detail

amplitude

private final double amplitude

Amplitude.

omega

private final double omega

Angular frequency.

phase

private final double phase

Phase.

Constructor Detail

HarmonicOscillator

public HarmonicOscillator(double amplitude,
                  double omega,
                  double phase)

Harmonic oscillator function.

Parameters:

amplitude - Amplitude.

omega - Angular frequency.

phase - Phase.

Method Detail

value

public double value(double x)

Compute the value of the function.

Specified by:

value in interface UnivariateFunction

Parameters:

x - Point at which the function value should be computed.

Returns:

the value of the function.

derivative

@Deprecated
public UnivariateFunction derivative()

Deprecated. as of 3.1, replaced by value(DerivativeStructure)

Returns the derivative of the function

Specified by:

derivative in interface DifferentiableUnivariateFunction

Returns:

the derivative function

value

private static double value(double xTimesOmegaPlusPhase,
           double amplitude)

Parameters:

xTimesOmegaPlusPhase - omega * x + phase.

amplitude - Amplitude.

Returns:

the value of the harmonic oscillator function at x.

value

public DerivativeStructure value(DerivativeStructure t)
                          throws DimensionMismatchException

Simple mathematical function.

UnivariateDifferentiableFunction classes compute both the value and the first derivative of the function.

Specified by:

value in interface UnivariateDifferentiableFunction

Parameters:

t - function input value

Returns:

function result

Throws:

DimensionMismatchException - if t is inconsistent with the function's free parameters or order

Since:

3.1