Re: FindRoot
- To: mathgroup at smc.vnet.net
- Subject: [mg31488] Re: FindRoot
- From: Erk Jensen <Erk.Jensen at cern.ch>
- Date: Thu, 8 Nov 2001 04:54:26 -0500 (EST)
- Organization: CERN http://www.cern.ch
- References: <9sb3u5$8oc$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Pieter-Jan.DeSmet at fys.kuleuven.ac.be wrote:
>
> Dear Sir,
>
> Can you clarify the following error message?
>
> In[3]:= f[i_] := x == i
>
> In[5]:= FindRoot[f[1], {x, 0}]
>
> FindRoot::frnum: Function {False} is not a length 1 list of
> numbers at {x} = {0.}.
>
> Out[5]=FindRoot[f[1], {x, 0}]
>
> This is a simplified version of an error message I got in a more
> difficult case. I hope that I have not made a stupid mistake.
>
> Thank you very much
>
> Pieter-Jan De Smet
Try FindRoot[Evaluate[f[1]],{x,0}]
Ciao
-erk-
--
Dr.-Ing. Erk JENSEN mailto:Erk.Jensen at cern.ch
CERN PS/RF L19510 http://cern.ch/Erk.Jensen
CH-1211 Geneva 23 Tel.: +41 22 76 74298
Switzerland Fax.: +41 22 76 78510