Package com.irurueta.numerical

Class PolynomialEvaluator

java.lang.Object

com.irurueta.numerical.PolynomialEvaluator

Direct Known Subclasses:

ComplexPolynomialEvaluator, RealPolynomialEvaluator

public class PolynomialEvaluator
extends Object

Utility class to evaluate polynomials having either real or complex coefficients.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PolynomialEvaluator()	Empty constructor.

Method Summary

Modifier and Type	Method	Description
static double	evaluate(double[] polyParams, double x)	Evaluates polynomial formed by provided polynomial parameters at provided point x.
static com.irurueta.algebra.Complex	evaluate(com.irurueta.algebra.Complex[] polyParams, com.irurueta.algebra.Complex x)	Evaluates polynomial formed by provided polynomial parameters at provided point x.

Methods inherited from class java.lang.Object

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

Constructor Details

PolynomialEvaluator

protected PolynomialEvaluator()

Empty constructor.

Method Details

evaluate

public static double evaluate(double[] polyParams,
 double x)

Evaluates polynomial formed by provided polynomial parameters at provided point x. The polynomial of degree n is defined as: p(x) = a0 * x^n + a1 * x^(n - 1) + ... a(n-1) * x + an hence, the array of parameters is [a0, a1, ... a(n-1), an].

Parameters:

polyParams - array of polynomial parameters.

x - point where polynomial is evaluated.

Returns:

result of evaluation.

Throws:

IllegalArgumentException - if provided array is null or has length 0.

evaluate

public static com.irurueta.algebra.Complex evaluate(com.irurueta.algebra.Complex[] polyParams,
 com.irurueta.algebra.Complex x)

Evaluates polynomial formed by provided polynomial parameters at provided point x. The polynomial of degree n is defined as: p(x) = a0 * x^n + a1 * x^(n - 1) + ... a(n-1) * x + an hence, the array of parameters is [a0, a1, ... a(n-1), an].

Parameters:

polyParams - array of polynomial parameters.

x - point where polynomial is evaluated.

Returns:

result of evaluation.

Throws:

IllegalArgumentException - if provided array is null or has length 0.