| polycoef |
|
Coefficients of a
Polynomial |
- DESCRIPTION
- Returns the coefficients of a polynomial.
-
- USAGE
- polycoef(x)
-
- VALUE
- Produces a vector whose elements are the coefficients of the polynomial whose roots are
the elements of x.
-
- DETAILS
- polycoef is the inverse of the built-in S-Plus function polyroot, up to ordering,
scaling, and roundoff error. NA's and Inf's in x are ignored.
-
- EXAMPLES
- > polycoef(c(1,1))
[1] 1 -2 1
> polyroot(polycoef(c(1,1)))
[1] 1+0i 1+0i
Gordon Smyth.
Copyright © 1996-2016. Last modified:
10 February 2004
