Package com.irurueta.numerical.interpolation

Class PolynomialInterpolator

java.lang.Object

com.irurueta.numerical.interpolation.BaseInterpolator

com.irurueta.numerical.interpolation.PolynomialInterpolator

public class PolynomialInterpolator
extends BaseInterpolator

Computes polynomial interpolation. For large sets of ata, this interpolator might return inaccurate results. Additionally, accuracy worsens as the polynomial degree to interpolate increases.

Field Summary

Fields

Modifier and Type	Field	Description
private double	dy	An indication of interpolation error on the y values of the last call to BaseInterpolator.interpolate(double).

Fields inherited from class com.irurueta.numerical.interpolation.BaseInterpolator

cor, mm, n, xx, yy

Constructor Summary

Constructors

Constructor	Description
PolynomialInterpolator(double[] x, double[] y)	Constructor.
PolynomialInterpolator(double[] x, double[] y, int m)	Constructor.
PolynomialInterpolator(double[] x, double[] y, int m, boolean check)	Constructor.

Method Summary

Modifier and Type	Method	Description
double	getDy()	Gets an indication of the error of interpolation on the y values.
double	rawinterp(int jl, double x)	Actual interpolation method.

Methods inherited from class com.irurueta.numerical.interpolation.BaseInterpolator

hunt, interpolate, locate

Methods inherited from class java.lang.Object

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

Field Details

dy

private double dy

An indication of interpolation error on the y values of the last call to BaseInterpolator.interpolate(double).

Constructor Details

PolynomialInterpolator

public PolynomialInterpolator(double[] x,
 double[] y,
 int m)

Constructor.

Parameters:

x - x values to interpolate to. Values in x must be monotonic (either increasing or decreasing)

y - y values to interpolate to.

m - length of x's and y's to take into account. Must be less or equal than x or y length.

Throws:

IllegalArgumentException - if x or y have invalid length or m exceeds length of x or y.

PolynomialInterpolator

public PolynomialInterpolator(double[] x,
 double[] y,
 int m,
 boolean check)

Constructor.

Parameters:

x - x values to interpolate to. Values in x must be monotonic (either increasing or decreasing)

y - y values to interpolate to.

m - length of x's and y's to take into account. Must be less or equal than x or y length.

check - true to make validations, false otherwise.

Throws:

IllegalArgumentException - if x or y have invalid length or m exceeds length of x or y.

PolynomialInterpolator

public PolynomialInterpolator(double[] x,
 double[] y)

Constructor.

Parameters:

x - x values to interpolate to. Values in x must be monotonic (either increasing or decreasing)

y - y values to interpolate to.

Throws:

IllegalArgumentException - if x or y have invalid length or m exceeds length of x or y.

Method Details

getDy

public double getDy()

Gets an indication of the error of interpolation on the y values.

Returns:

indication of error of interpolation.

rawinterp

public double rawinterp(int jl,
 double x)
                 throws InterpolationException

Actual interpolation method.

Specified by:

rawinterp in class BaseInterpolator

Parameters:

jl - index where value x to be interpolated in located in the array of xx.

x - value to obtain interpolation for.

Returns:

interpolated value.

Throws:

InterpolationException - if interpolation fails.