Package ffx.numerics.integrate

Class CosineWave

java.lang.Object

ffx.numerics.integrate.FunctionDataCurve

ffx.numerics.integrate.CosineWave

All Implemented Interfaces:

DataSet

public class CosineWave
extends FunctionDataCurve

A CosineWave describes points along a sine wave of f(x) = a*sin(jx).

Author:

Jacob M. Litman

Field Summary

Fields inherited from class ffx.numerics.integrate.FunctionDataCurve

halfWidthEnd, lb, points, ub, x

Constructor Summary

Constructors

Constructor	Description
CosineWave(double[] x, boolean halfWidthEnds, double a, double n)	Constructs f(x) = a*cos(nx).
CosineWave(double[] x, double a, double n)	Constructs f(x) = a*cos(nx).

Method Summary

Modifier and Type	Method	Description
double	fX(double x)	Evaluates the function at x.
double	integralAt(double x)	Analytical integral at a point.
String	toString()

Methods inherited from class ffx.numerics.integrate.FunctionDataCurve

analyticalIntegral, analyticalIntegral, approxEquals, approxEquals, assertXIntegrity, binWidth, getAllFxPoints, getFxPoint, getX, halfWidthEnds, lowerBound, numPoints, upperBound

Methods inherited from class java.lang.Object

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

Constructor Details

CosineWave

public CosineWave(double[] x,
 double a,
 double n)

Constructs f(x) = a*cos(nx).

Parameters:

x - an array of

invalid reference

double

objects.

a - the magnitude.

n - the periodicity.

CosineWave

public CosineWave(double[] x,
 boolean halfWidthEnds,
 double a,
 double n)

Constructs f(x) = a*cos(nx).

Parameters:

x - an array of

invalid reference

double

objects.

halfWidthEnds - Use half-width start and end bins.

a - the magnitude.

n - the periodicity.

Method Details

fX

public double fX(double x)

Evaluates the function at x.

Specified by:

fX in class FunctionDataCurve

Parameters:

x - x

Returns:

f(x)

integralAt

public double integralAt(double x)

Analytical integral at a point.

Specified by:

integralAt in class FunctionDataCurve

Parameters:

x - Point

Returns:

Exact finite integral of 0 to this point

toString

public String toString()

Overrides:

toString in class FunctionDataCurve