Re: minimum of a function
- To: mathgroup at smc.vnet.net
- Subject: [mg75050] Re: minimum of a function
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Sun, 15 Apr 2007 05:12:42 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <evpoqm$6cp$1@smc.vnet.net>
Sven Krueger wrote:
> Hi
>
> I also have a question concerning a mathematica problem:
>
> I search the minimum of a function
> fmin := FindMinimum[f[x], {x, 0}]
> Evaluate[fmin]
>
> I get out for example
> {2.4, {x -> 0.2}}
>
> Is it possible to use the result x=0.2 afterwards?
> I would like to fix x after getting out the value of x at different
> results of fmin.
>
> Thank you for your help
>
> Sven Krüger
>
>
In[1]:=
sol = {2.4, {x -> 0.2}}
Out[1]=
{2.4, {x -> 0.2}}
The solution for x is returned as a transformation rule. You can use the
replacement operator /. to apply the rule. See [1] for detailed information.
In[2]:=
x /. sol[[2]]
Out[2]=
0.2
In[3]:=
xmin = x /. sol[[2]]
Out[3]=
0.2
Regards,
Jean-Marc
[1] _The Mathematica Book_, "1.4.2 Values for Symbols",
http://documents.wolfram.com/mathematica/book/section-1.4.2