On Wed, 8 Jun 2005 17:08:35 +0200 Fredrik Thuring wrote:
Hi!
I´m 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? I´ve
tried nlm and optim on the square of the function but the solution is
very unstable.
Look
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
Have you plotted f(x)? Plot(s) might help reveal why the solution
is very unstable. If f is a function of a univariate x, this is
trivial. If f is a function of a bivariate x, use something like
contour or persp. If higher dimensions, I might use something like
fit -
