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MathGroup Archive 2004

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AW: Sum of list elements

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49317] AW: [mg49313] Sum of list elements
  • From: Matthias.Bode at oppenheim.de
  • Date: Tue, 13 Jul 2004 05:54:07 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello Erik,

please try:

In[22]:=
lst01 = {2, 2, 1}

Out[22]=
{2, 2, 1}

In[23]:=
sum01 = Plus @@ lst01

Out[23]=
5

In[24]:=
lst01/sum01

Out[24]=
{2/5, 2/5, 1/5}

Best regards,
Matthias Bode
Sal. Oppenheim jr. & Cie. KGaA
Untermainanlage 1
D-60329 Frankfurt am Main
GERMANY
Tel.: +49(0)69 71 34 53 80
Mobile: +49(0)172 6 74 95 77
Fax: +49(0)69 71 34 95 380
E-mail: matthias.bode at oppenheim.de
Internet: http://www.oppenheim.de



-----Ursprüngliche Nachricht-----
Von: spam at husumtoften.invalid [mailto:spam at husumtoften.invalid] 
Gesendet: Dienstag, 13. Juli 2004 10:33
An: mathgroup at smc.vnet.net
Betreff: [mg49313] Sum of list elements


I'm trying to find a function [possibly a way to make a function] which
calculate the sum of the elements of a list.

Right now, the purpose is to find the relative distribution of the
elements of a list. That is, I need a way to get out that the
distribution of:

{2, 2, 1}

is

{2/5, 2/5, 1/5}.

Had I been able to get the sum of the list elements in this way:

Sum[{2, 2, 1}]

it could had been done with:

l = {2, 2, 1}
l / Sum[l]

-- 
Per Erik Rnne


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