Parallel Colt 0.7.2

## cern.jet.math.tdouble Class Polynomial

java.lang.Object
cern.jet.math.tdouble.DoubleConstants
cern.jet.math.tdouble.Polynomial

public class Polynomial
extends DoubleConstants

Polynomial functions.

Method Summary
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 java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

### 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

Parallel Colt 0.7.2