Re: Confusion between rules and variables
- To: mathgroup at smc.vnet.net
- Subject: [mg42423] Re: Confusion between rules and variables
- From: Bill Rowe <listuser at earthlink.net>
- Date: Sun, 6 Jul 2003 06:57:05 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
On 7/5/03 at 3:11 AM, greenberg at ucdavis.edu (Jonathan Greenberg) wrote:
> I ran a FindRoot where the output was {x->0.543} -- How do I extact that
> value (0.543) for use in some other equation (e.g. How do I set a variable
> equal to 0.543, instead of that entire rule)?
Try
In[1]:=
x = x /. FindRoot[2*x + 3 == 0, {x, 0}]
Out[1]=
-1.5
In[2]:=
x
Out[2]=
-1.5