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MathGroup Archive 2008

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Re: Number of monominals

  • To: mathgroup at smc.vnet.net
  • Subject: [mg87055] Re: Number of monominals
  • From: Patrick Klitzke <philologos14 at gmx.de>
  • Date: Sun, 30 Mar 2008 01:17:34 -0500 (EST)

According to the documentation, the function Length[expr] gives the 
number of elements in expr.
Also "The length of a symbol is 0".
You have to write it as a list, if you want the expression to be counted.
Length[{f[1]}]

The other inputs are working, because Length counts the elements of the 
function Plus:

In[1]:=Length[Plus[f[1],f[2],f[3]]]
Out[1]:=3
OK!
In[2]:=Length[Plus[f[1],f[2]]]
Out[2]:=2
In[3]:=Length[f[1]]
Out[3]:=0

I hope, that I could answer your question.

Patrick



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