Name:       POLYN


Purpose:    POLYN  computes the value of an N-component polynomial
            DPOLYN computes the partial derivatives of that polynomial

Files:      polyn.dc2,polyn.shl

Author:     Peter Roelfsema


Call:

    PX=POLYN(X,PAR,NPAR)

	   Input parameters:
          X     -R   -running coordinate.
          PAR   -R   -array defined as follows: PAR(0:NPAR) that
			  contains the parameters for the polynomial:
	                  PAR(n)-polynomial coefficient for X**n.
          NPAR  -I   -degree of the polynomial.

Use:
            POLYN gives the value of a multi-component polynomial.
            Note that the polynomial is defined as the following
            summation:

                 PX = 0  FOR N=0 TO NPAR ( PX = PX + PAR(N) * X**N )

            POLYN does not check for floating overflows in X**N, you
            will have to worry about that yourself.


Update History:
   8- 7-85-PRR.-original document
  16- 6-86-PRR.-converted for VAX8600.
  10- 9-92-PRR.-converted to new GIPSY