Re: Re: Map[] and multiple args function

*To*: mathgroup at smc.vnet.net*Subject*: [mg96290] Re: [mg96228] Re: [mg96198] Map[] and multiple args function*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Wed, 11 Feb 2009 05:18:01 -0500 (EST)*References*: <20738936.1234177212952.JavaMail.root@m02>*Reply-to*: drmajorbob at longhorns.com

Or, simpler: foo[x_, y_, z_] := x + 2*y + 3*z list = {{1, 2, 3}, {4, 5, 6}}; Total[foo @@@ list] 46 Bobby On Tue, 10 Feb 2009 04:47:14 -0600, David Park <djmpark at comcast.net> wrote: > You could do something like the following: > > Foo[x_, y_, z_] := x + 2*y + 3*z > > list = {{1, 2, 3}, {4, 5, 6}}; > > Total@(Foo @@ # & /@ list) > 46 > > Plus @@ (Foo @@ # & /@ list) > 46 > > > David Park > djmpark at comcast.net > http://home.comcast.net/~djmpark/ > > > From: sagrailo at gmail.com [mailto:sagrailo at gmail.com] > > I know this has to be FAQ, but I'm just not able to find an answer > anywhere, so - here it goes: I have a multiple-arguments function, > say something like: > Foo[x_, y_, z_] := x + 2*y + 3*z > Now, I want to call this function number of times, over different sets > of arguments, and then to sum results. I thought about storing > argument triplets into some kind of list, and then employing sequence > of Map[] and Apply[] to get the job done. After number of trials and > errors, I came up with following piece of code doing the thing: > Plus @@ Foo /@ {{1, 2, 3}, {4, 5, 6}} /. List -> Sequence > but I even don't fully understand what's going here, and also I'm > wondering is there a "better" way to accomplish this. So - any > suggestion? > > Thanks. > > > -- DrMajorBob at longhorns.com