simple vactor magitude question

*To*: mathgroup at smc.vnet.net*Subject*: [mg43754] simple vactor magitude question*From*: Nathan Moore <nmoore at physics.umn.edu>*Date*: Fri, 3 Oct 2003 02:28:42 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

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