Package cern.jet.math

Class Polynomial


  • public class Polynomial
    extends Constants
    Polynomial functions.
    • Constructor Summary

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

      All Methods Static Methods Concrete Methods 
      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 java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • Polynomial

        protected Polynomial()
        Makes this class non instantiable, but still let's others inherit from it.
    • Method Detail

      • p1evl

        public static double p1evl​(double x,
                                   double[] coef,
                                   int N)
                            throws java.lang.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:
        java.lang.ArithmeticException
      • polevl

        public static double polevl​(double x,
                                    double[] coef,
                                    int N)
                             throws java.lang.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:
        java.lang.ArithmeticException