org.apache.commons.math3.optimization.fitting

Class PolynomialFitter

java.lang.Object

org.apache.commons.math3.optimization.fitting.CurveFitter<PolynomialFunction.Parametric>

org.apache.commons.math3.optimization.fitting.PolynomialFitter

Deprecated.

As of 3.1 (to be removed in 4.0).

@Deprecated
public class PolynomialFitter
extends CurveFitter<PolynomialFunction.Parametric>

Polynomial fitting is a very simple case of curve fitting. The estimated coefficients are the polynomial coefficients (see the fit method).

Since:

2.0

Constructor Summary

Constructors

Constructor and Description
PolynomialFitter(DifferentiableMultivariateVectorOptimizer optimizer) Deprecated. Simple constructor.
PolynomialFitter(int degree, DifferentiableMultivariateVectorOptimizer optimizer) Deprecated. Since 3.1 (to be removed in 4.0). Please use PolynomialFitter(DifferentiableMultivariateVectorOptimizer) instead.

Method Summary

Modifier and Type	Method and Description
double[]	fit() Deprecated. Since 3.1 (to be removed in 4.0). Please use fit(double[]) instead.
double[]	fit(double[] guess) Deprecated. Get the coefficients of the polynomial fitting the weighted data points.
double[]	fit(int maxEval, double[] guess) Deprecated. Get the coefficients of the polynomial fitting the weighted data points.

Methods inherited from class org.apache.commons.math3.optimization.fitting.CurveFitter

addObservedPoint, addObservedPoint, addObservedPoint, clearObservations, fit, fit, getObservations

Methods inherited from class java.lang.Object

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

Constructor Detail

PolynomialFitter

@Deprecated
public PolynomialFitter(int degree,
                                    DifferentiableMultivariateVectorOptimizer optimizer)

Deprecated. Since 3.1 (to be removed in 4.0). Please use PolynomialFitter(DifferentiableMultivariateVectorOptimizer) instead.

Simple constructor.

The polynomial fitter built this way are complete polynomials, ie. a n-degree polynomial has n+1 coefficients.

Parameters:

degree - Maximal degree of the polynomial.

optimizer - Optimizer to use for the fitting.

PolynomialFitter

public PolynomialFitter(DifferentiableMultivariateVectorOptimizer optimizer)

Deprecated.

Simple constructor.

Parameters:

optimizer - Optimizer to use for the fitting.

Since:

3.1

Method Detail

fit

@Deprecated
public double[] fit()

Deprecated. Since 3.1 (to be removed in 4.0). Please use fit(double[]) instead.

Get the polynomial fitting the weighted (x, y) points.

Returns:

the coefficients of the polynomial that best fits the observed points.

Throws:

ConvergenceException - if the algorithm failed to converge.

fit

public double[] fit(int maxEval,
                    double[] guess)

Deprecated.

Get the coefficients of the polynomial fitting the weighted data points. The degree of the fitting polynomial is guess.length - 1.

Parameters:

guess - First guess for the coefficients. They must be sorted in increasing order of the polynomial's degree.

maxEval - Maximum number of evaluations of the polynomial.

Returns:

the coefficients of the polynomial that best fits the observed points.

Throws:

TooManyEvaluationsException - if the number of evaluations exceeds maxEval.

ConvergenceException - if the algorithm failed to converge.

Since:

3.1

fit

public double[] fit(double[] guess)

Deprecated.

Get the coefficients of the polynomial fitting the weighted data points. The degree of the fitting polynomial is guess.length - 1.

Parameters:

guess - First guess for the coefficients. They must be sorted in increasing order of the polynomial's degree.

Returns:

the coefficients of the polynomial that best fits the observed points.

Throws:

ConvergenceException - if the algorithm failed to converge.

Since:

3.1