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MathGroup Archive 2003

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Re: a little more complex list operation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg40255] Re: [mg40237] a little more complex list operation
  • From: Dr Bob <majort at cox-internet.com>
  • Date: Fri, 28 Mar 2003 04:30:59 -0500 (EST)
  • References: <200303271149.GAA22091@smc.vnet.net>
  • Reply-to: majort at cox-internet.com
  • Sender: owner-wri-mathgroup at wolfram.com

data = {{x1, y1}, {x2, y2}, {x3, y3}};
list[f_, g_]@{a_, b_} := {f@a, g@b}
list[f, g] /@ data

{{f[x1], g[y1]}, {f[x2], g[y2]}, {f[x3], g[y3]}}

or

MapThread[#1@#2 &, {{f, g}, #}] & /@ data

Bobby

On Thu, 27 Mar 2003 06:49:43 -0500 (EST), Nathan Moore 
<nmoore at physics.umn.edu> wrote:

> Thanks very much for all the previous replies.  Another simple question -
> though I guess this will require more complex syntax.  Suppose I have the
> list,
>
> data = {{x1,y1},{x2,y2},{x3,y3}}
>
> and I want to produce the result (for fitting/plotting)
>
> data2 = {{f[x1],g[y1]},{f[x2],g[y2]},{f[x3],g[y3]}}
>
> I assume that if there was only one transform I wanted to apply, f[x],
> then I could say
> 	data2 = f[data]
> but how about this more complicated transform with functions f and g?
>
> again thanks!  Your replies have been very helpful!
>
> Nathan Moore, University of Minnesota Physics
>
>
>



-- 
majort at cox-internet.com
Bobby R. Treat



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