Re: Map[] and multiple args function

*To*: mathgroup at smc.vnet.net*Subject*: [mg96357] Re: Map[] and multiple args function*From*: Yannan <lumeng at gmail.com>*Date*: Thu, 12 Feb 2009 06:36:29 -0500 (EST)*References*: <gmp0ps$c0a$1@smc.vnet.net>

In[10]:= SetAttributes[Foo, Listable] Foo[x_, y_, z_] := x + 2*y + 3*z Foo[{1, 1, 1}, {2, 2, 2}, {3, 3, 3}] Foo[{1, 2, 3}, {2, 3, 4}, {4, 5, 6}] Out[12]= {14, 14, 14} Out[13]= {17, 23, 29} On Feb 9, 4:33 am, sagra... at gmail.com wrote: > 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.