Posted by Jana Tharma on March 11, 1998 at 20:50:04:
In Reply to: Levenberg-Marquardt Method posted by Gary Gralton on March 06, 1998 at 15:52:28:
I had a problem like this before.
If we are on the same wavelength, then I think the
routine HYBRJ1 (analytic jacobian) or HYBRD1
(discretised jacobian) might help.
These solve for a set of nonlinear equations.
It is very fast and accurate, too.