RE: simple vactor magitude question

*To*: mathgroup at smc.vnet.net*Subject*: [mg43776] RE: [mg43754] simple vactor magitude question*From*: "John C. Erb, Ph.D." <John_C_Erb at prodigy.net>*Date*: Sat, 4 Oct 2003 02:04:54 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi! If your 1D list is: pList={x1,x2,x3,x4,...,xn} Then you can find the sum by Apply[Plus,pList] John C. Erb Email: John_C_Erb at prodigy.net -----Original Message----- From: Nathan Moore [mailto:nmoore at physics.umn.edu] To: mathgroup at smc.vnet.net Subject: [mg43776] [mg43754] simple vactor magitude question Suppose I generate a 1-d vecctor of "N" numbers, p[i], and now I want to find the sum of (the vector element * index). I think the syntax should look something like, Sum[p[i]*i,{i,0,N}] but this doesn't seem to be the correct syntax - any help would be appreciated. Nathan Moore, University of Minnesota Physics