Re: Re: Sum of list elements

*To*: mathgroup at smc.vnet.net*Subject*: [mg49324] Re: [mg49315] Re: [mg49313] Sum of list elements*From*: DrBob <drbob at bigfoot.com>*Date*: Wed, 14 Jul 2004 07:29:30 -0400 (EDT)*References*: <200407130923.FAA10334@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Plus@@A can also be written as any of these: Tr@A Tr[A] Total@A Total[A] Total is new in version 5. Bobby On Tue, 13 Jul 2004 05:23:18 -0400 (EDT), Ravinder Kumar B. <ravi at crest.ernet.in> wrote: > It is easy to acheive using Map (@@) function as follows: > > A={1,2,3,4,5}; > B=A/Plus@@A; > gives the desired result > B={1/15,2/15,3/15,4/15,5/15} > > > > On Tue, 13 Jul 2004, Per Rønne wrote: > >> 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] >> >> > -- DrBob at bigfoot.com www.eclecticdreams.net

**References**:**Re: Sum of list elements***From:*"Ravinder Kumar B." <ravi@crest.ernet.in>