[R] Solve f(x) = 0

[Martyn Plummer]

On Wed, 2005-06-08 at 17:08 +0200, Fredrik Thuring wrote:
> Hi!
> 
> Im need a function that solves the equation f(x) = 0 (i.e. the root of
> the function) when f is a nonlinear function. Is there any? Ive tried nlm
> and optim on the square of the function but the solution is very unstable.

Your colleague Martin Englund asked the same question.  If x is scalar,
you can use uniroot(). If it's a polynomial then polyroot() finds all
the zeros. I hope that helps.

Martyn