Re: How to extract a solution from Mathematica's answer to "Solve"
- To: mathgroup at smc.vnet.net
- Subject: [mg49382] Re: How to extract a solution from Mathematica's answer to "Solve"
- From: pnardon <pnardon at ulb.ac.be>
- Date: Sat, 17 Jul 2004 06:38:46 -0400 (EDT)
- References: <cd8amc$oj2$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Rainer wrote:
> I have a question concerning the Solve command. Assume I have solved
> an equation using Solve. Mathematica returns the solutions in the
> following form (example for 2 solutions):
>
> {{x->-2}, {x->2}}
>
> Now, assume I wish always to pick the first of these two solutions and
> store it in a variable (to be able to continue working with it in the
> Notebook). Is there a command to "extract" the second solution and to
> store it in a variable. Since the response is in a form of a matrix
> {{...},{...}}, I have tried things like MySolution = %[[1]], but it
> always fails.
>
> I appreciate any helpful commands!
> Thanks
> Rainer
>
try this:
you have
MySolution=Solve[....,x]
then
MyVar=x/.First[MySolution]
then you can use MyVar anywhere