datan

Class LsqPol

java.lang.Object

datan.LsqPol

public final class LsqPol
extends java.lang.Object

A class porforming the least-squares fit of a polynomial to a set of data.

Author:

Siegmund Brandt.

Constructor Summary

Constructors

Constructor and Description
LsqPol(DatanVector t, DatanVector y, DatanVector deltay, int r)

Method Summary

Methods

Modifier and Type	Method and Description
double	getChiSquare()
DatanMatrix	getCovarianceMatrix()
DatanVector	getResult()
boolean	hasConverged()

Methods inherited from class java.lang.Object

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

Constructor Detail

LsqPol

public LsqPol(DatanVector t,
      DatanVector y,
      DatanVector deltay,
      int r)

Parameters:

t - vector of controlled variables

y - vector of the corresponding measured values.

deltay - vector of measurement errors.

r - number of unknowns (=1 for polynomial of order 0, =2 for order 1, etc.).

Method Detail

getResult

public DatanVector getResult()

Returns:

the vector of fitted polynomial coefficients.

getCovarianceMatrix

public DatanMatrix getCovarianceMatrix()

Returns:

the covariance matrix of the polynomial coefficients.

getChiSquare

public double getChiSquare()

Returns:

the value of the minimum function.

hasConverged

public boolean hasConverged()

Returns:

true if iteration successful, false otherwise.