Class Polynomial

java.lang.Object

cern.jet.math.Constants

cern.jet.math.Polynomial

public class Polynomial
extends Constants

Polynomial functions.

Field Summary

Fields inherited from class Constants

big, biginv, LOGPI, MACHEP, MAXGAM, MAXLOG, MINLOG, SQRTH, SQTPI

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Polynomial()	Makes this class non instantiable, but still let's others inherit from it.

Method Summary

Modifier and Type	Method	Description
static double	p1evl(double x, double[] coef, int N)	Evaluates the given polynomial of degree N at x, assuming coefficient of N is 1.0.
static double	polevl(double x, double[] coef, int N)	Evaluates the given polynomial of degree N at x.

Methods inherited from class Object

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

Constructor Details

Polynomial

protected Polynomial()

Makes this class non instantiable, but still let's others inherit from it.

Method Details

p1evl

public static double p1evl(double x,
 double[] coef,
 int N)
                    throws ArithmeticException

Evaluates the given polynomial of degree N at x, assuming coefficient of N is 1.0. Otherwise same as polevl().

                    2          N
y  =  C  + C x + C x  +...+ C x
       0    1     2          N

where C  = 1 and hence is omitted from the array.
       N

Coefficients are stored in reverse order:

coef[0] = C  , ..., coef[N-1] = C  .
           N-1                   0

Calling arguments are otherwise the same as polevl().

In the interest of speed, there are no checks for out of bounds arithmetic.

Parameters:

x - argument to the polynomial.

coef - the coefficients of the polynomial.

N - the degree of the polynomial.

Throws:

ArithmeticException

polevl

public static double polevl(double x,
 double[] coef,
 int N)
                     throws ArithmeticException

Evaluates the given polynomial of degree N at x.

                    2          N
y  =  C  + C x + C x  +...+ C x
       0    1     2          N

Coefficients are stored in reverse order:

coef[0] = C  , ..., coef[N] = C  .
           N                   0

In the interest of speed, there are no checks for out of bounds arithmetic.

Parameters:

x - argument to the polynomial.

coef - the coefficients of the polynomial.

N - the degree of the polynomial.

Throws:

ArithmeticException