Re: ?
- To: mathgroup at smc.vnet.net
- Subject: [mg120808] Re: ?
- From: Barrie Stokes <Barrie.Stokes at newcastle.edu.au>
- Date: Thu, 11 Aug 2011 05:11:56 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201108101047.GAA26230@smc.vnet.net>
Mate:
As we say in Australia, RTFM.
If you type -> (hyphen, greater than) into the online help, you get plenty of examples concerning Rules.
A lot of us do something like:
sol = FindRoot[x+9,{x,-5}]
rootOfEquation = x/.sol
Cheers
Barrie
>>> On 10/08/2011 at 8:47 pm, in message <201108101047.GAA26230 at smc.vnet.net>,
David Kirkby <david.kirkby at onetel.net> wrote:
> The output of FindRoot[] when trying to find a root is like:
>
> {x -> 0.49454545}
>
> How can I convert that list, into the number 0.49454545?
>
> In[1]:= FindRoot[x+9,{x,-5}]
>
> Out[1]= {x -> -9.}
>
> In[2]:= Head[%]
>
> Out[2]= List
>
> I can't seem to find any "normal" operations on the list which give me
> the number.
>
> Dave
- References:
- How do I get a numeric value from FindRoot[] ?
- From: David Kirkby <david.kirkby@onetel.net>
- How do I get a numeric value from FindRoot[] ?