MathGroup Archive 2001

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  • To: mathgroup at
  • Subject: [mg31463] FindRoot
  • From: Pieter-Jan.DeSmet at
  • Date: Wed, 7 Nov 2001 05:29:43 -0500 (EST)
  • Sender: owner-wri-mathgroup at

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

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