Re: Dot or Inner ... but not quite
- To: mathgroup at smc.vnet.net
- Subject: [mg79714] Re: Dot or Inner ... but not quite
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 2 Aug 2007 03:56:00 -0400 (EDT)
- Organization: Uni Leipzig
- References: <f8n2rc$lp9$1@smc.vnet.net> <f8phgv$1ca$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Sorry, I for got the Plus @@ (l1*l2) Regards Jens Jens-Peer Kuska wrote: > Hi, > > and > > l1*l2 > > ?? > > > Regards > Jens > Diamond, Mark wrote: >> I have two equi-length lists, the first of number, the second of >> (equi-length) lists of numbers , such as >> >> l1={1,4,3}; >> l2={{1,7},{1,9},{5,2}}; >> >> I want to produce 1*{1,7}+4*{1,9}+3*{5,2} >> >> It looks so close to Inner that I thought I could use it in some form, but I >> have ended up using >> >> (#[[1]]*#[[2]])& /@ Transpose[{l1,l2}] >> >> Is there a better way using one of the builtin functions with which I am >> unfamiliar? >> >> Cheers, >> >> Mark Diamond >> >> >> >