Re: lists w/o double brackets
- To: mathgroup at smc.vnet.net
- Subject: [mg31445] Re: lists w/o double brackets
- From: Erk Jensen <Erk.Jensen at cern.ch>
- Date: Wed, 7 Nov 2001 05:29:02 -0500 (EST)
- References: <9s5jmh$4lo$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Gavin K Brennen wrote:
>
> Hello,
>
> I am using the function FindRoot with a large number of simultaneous equations.
>
> FindRoot[eqs,initialvals]
>
> I have a function for generating the equations which works fine as a list
> input in FindRoot, however I am having difficulty creating a function for
> generating initialvals that will be accepted by FindRoot. The problem
> seems to be that FindRoot demands a format
>
> FindRoot[{eq1,eq2,...,eqn},{var1,val1},{var2,val2},...,{varn,valn}]
>
> the variables and initial values of which must appear as a list without
> double brackets. The function I have for generating the initial values
> always outputs the list as follows
>
> Input
> initialvals
> Output
> {{var1,val1},{var2,val2},...,{varn,valn}}.
>
eqns = {{eq1, eq2,...,eqn}}
initialvals = {{var1, val1},{var2, val2},...,{varn, valn}}
MapThread[FindRoot, Join[eqns, initialvals], 0]
Ciao
-erk-