To plot solutions, FindRoot as a function

*To*: mathgroup at smc.vnet.net*Subject*: [mg37341] To plot solutions, FindRoot as a function*From*: Veniamin Abalmassov <V.Abalmassov at unibas.ch>*Date*: Thu, 24 Oct 2002 02:55:36 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello, I'd like to plot the solution of an equation which depends on two parameters, e.g. a*Tanh[b*x] == x So, I'd like to see it in 3D, one axis is "a", other is "b", and the last is "solution". I've tried naively to do it as follows: sol[a_,b_]:=FindRoot[a*Tanh[b*x] == x, {x, {0.01, 0.1}}] Plot[sol[a,b], {a, 1, 2}, {b, 1, 2}] And it doesn't work. Help me, please. What can I do? Thanks a lot, Veniamin

**Follow-Ups**:**Re: To plot solutions, FindRoot as a function***From:*Tomas Garza <tgarza01@prodigy.net.mx>