com.mockturtlesolutions.snifflib.invprobs

Class Polint

java.lang.Object

com.mockturtlesolutions.snifflib.invprobs.Dbracket

com.mockturtlesolutions.snifflib.invprobs.Polint

public class Polint
extends Dbracket

Polynomial interpolation or extrapolation with error estimates. X must be a column vector however Y may be a matrix with the same number of rows as X. This is based on polint given on pp. 102-104 Numerical Recipies in Fortran by Press et al.

Field Summary

Fields

Modifier and Type	Field and Description
protected DblMatrix	C
protected DblMatrix	D
protected DblMatrix	dY
protected DblMatrix	Y

Fields inherited from class com.mockturtlesolutions.snifflib.invprobs.Dbracket

CurrentIndex, X

Constructor Summary

Constructors

Constructor and Description
Polint(DblMatrix X, DblMatrix Y) Construct a Polint object for column vector X and matrix Y.

Method Summary

Methods

Modifier and Type	Method and Description
DblMatrix[]	predictAt(DblMatrix xx) Make a Nth order polynomial interpolation (or extrapolation) at the given data point.

Methods inherited from class com.mockturtlesolutions.snifflib.invprobs.Dbracket

bracket, getCenteredIndexWindow, getCenteredIndexWindow, getCenteredWindow, getCurrentIndex, getTotalDataCount, hunt, setCurrentIndex

Methods inherited from class java.lang.Object

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

Field Detail

Y

protected DblMatrix Y

C

protected DblMatrix C

D

protected DblMatrix D

dY

protected DblMatrix dY

Constructor Detail

Polint

public Polint(DblMatrix X,
      DblMatrix Y)

Construct a Polint object for column vector X and matrix Y. Y must have the same number of rows as X but may have multiple columns.

Method Detail

predictAt

public DblMatrix[] predictAt(DblMatrix xx)

Make a Nth order polynomial interpolation (or extrapolation) at the given data point. The output is a DblMatrix[] whose first element is the prediction vector at the scalar point xx and whose second element is the prediction error estimate.