xal.extension.fit

Class LinearInterpolator

java.lang.Object

xal.extension.fit.LinearInterpolator

public final class LinearInterpolator
extends java.lang.Object

LinearInterpolator calculates the linear interpolated value at at any point within the bounds of an array of values.

Field Summary

Fields

Modifier and Type	Field and Description
protected double	_start
protected double	_step
protected double[]	_values

Constructor Summary

Constructors

Constructor and Description
LinearInterpolator(double[] values, double start, double step) Creates a new instance of Interpolator.

Method Summary

Modifier and Type	Method and Description
double	calcValueAt(double point) Calculate the interpolated value at the specified point in the domain.

Methods inherited from class java.lang.Object

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

Field Detail

_values

protected final double[] _values

_start

protected final double _start

_step

protected final double _step

Constructor Detail

LinearInterpolator

public LinearInterpolator(double[] values,
                          double start,
                          double step)

Creates a new instance of Interpolator.

Parameters:

values - is the array of values at fixed intervals.

start - is the start of the domain of points and corresponds to the first array element

step - is the step in the domain for each successive element in the array

Method Detail

calcValueAt

public double calcValueAt(double point)
                   throws java.lang.ArrayIndexOutOfBoundsException

Calculate the interpolated value at the specified point in the domain. The point must reside within the domain of points from start to start + step * values.length.

Parameters:

point - The point in the domain for which we should interpolate the value.

Returns:

The interpolated value.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if the point does not fall int the accepted domain