Re: Hold problems with FindRoot

*To*: mathgroup at smc.vnet.net*Subject*: [mg57073] Re: Hold problems with FindRoot*From*: Jonas Björnerstedt <lists at bjornerstedt.org>*Date*: Sat, 14 May 2005 04:58:11 -0400 (EDT)*References*: <428457A1.3020501@bjornerstedt.org>*Sender*: owner-wri-mathgroup at wolfram.com

Hello again, There was a small mistake in my previous posting. It should have said: FindRoot[Evaluate[{f[x,y]==0, g[x,y]==0}],{{x,1},{y,1}}] where f and g are functions that work correctly. Trying to solve one equation for two unknowns would cause other problems than I am currently having. Jonas. Jonas Björnerstedt wrote: > Hello all, > > I have problems getting FindRoot to evaluate the equations it > evaluates, despite using Evaluate on the equations. I have a rather > complex function f[x,y] that works correctly with individual values x > and y. Evaluating the following expression does not work however. > > FindRoot[Evaluate[f[x,y]==0],{{x,1},{y,1}}] > > When evaluating, I get similar errors as when I evaluate f without > inserting values for x and y. I can also do a Plot3D on f without > using Evaluate. > > Does anybody have an idea what the problem is? > > Jonas >

**Follow-Ups**:**Re: Re: Hold problems with FindRoot***From:*Chris Chiasson <chris.chiasson@gmail.com>