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MathGroup Archive 2004

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Re: Sum of list elements

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49320] Re: Sum of list elements
  • From: spam at husumtoften.invalid (Per Rønne)
  • Date: Wed, 14 Jul 2004 07:29:25 -0400 (EDT)
  • References: <cd0bgd$aik$1@smc.vnet.net>
  • Reply-to: spam at husumtoften.dk (Per Rønne)
  • Sender: owner-wri-mathgroup at wolfram.com

Florian Jaccard <florian.jaccard at eiaj.ch> wrote:

> Is this what you want ?
> 
> In[193]:=
> liste={2,2,1};
> 
> In[195]:=
> Plus@@liste
> 
> Out[195]=
> 5
> 
> In[196]:=
> 1/Plus@@liste*liste
> 
> Out[196]=
> {2/5, 2/5, 1/5}

Thank you very much to you and Ravinder Kumar B. Instead, I was trying
with something like:

sum[l_] := Module[
    {c = 0},
    Do[c = c + l[[i]], {i,  Length[l]}]; Return[c]]

But of course the use of Apply [@@] is a better solution.

BTW, I don't understand why threads in this newsgroup are grouped so
loosely. It can be seen in MacSOUP, in the tree window, that there
should be missing answers?
-- 
Per Erik Rønne


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