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Re: ?

• To: mathgroup at smc.vnet.net
• Subject: [mg120788] Re: ?
• From: Arturo Amador <arturo.amador at ntnu.no>
• Date: Thu, 11 Aug 2011 03:27:31 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201108101047.GAA26230@smc.vnet.net>

Try:

FindRoot[x+9,{x,-5}][[1]][[2]]


--
Arturo Amador Cruz
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On Aug 10, 2011, at 12:47 PM, David Kirkby 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>