FindRoot: Slight variation of usage
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg1709] FindRoot: Slight variation of usage
- From: corless at optics.rochester.edu (John D Corless)
- Date: Mon, 17 Jul 1995 05:04:34 -0400
- Organization: University of Rochester, School of Engineering
Hi, I've got a quick question. I want to use FindRoot to find the root of a multi-variable function, e.g. f[x1_,x2_] := x2 + Cos[x1] for a _fixed_ value of the other variables (x2=constant) and find the root in the (only) remaining variable, x1. How should I do this for many different realizations of the other variables? Thanks, John P.S. As an aside, I wrote my own program that combines Newton- Raphson root finding with the bisection method to guarantee a root (provided it is bracketed) in the interval. FindRoot sometimes returned roots out of my xstart,xend domain. I am actually using this program in the above question, but thought the procedure would be the same. ________________________________________________________________________ John D. Corless Institute of Optics (716) 275-8006 phone University of Rochester (716) 244-4936 fax Rochester, NY 14627 corless at optics.rochester.edu ________________________________________________________________________