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.

• Prev by Date: Re: How to simplify?
• Next by Date: Re: linear regression with errors in both variables
• Previous by thread: Re: Re: Map[] and multiple args function
• Next by thread: Problem importing HTML with Mathematica