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-