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Re: FindRoot


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
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