Re: defining a transform from two lists
- To: mathgroup at smc.vnet.net
- Subject: [mg40843] Re: defining a transform from two lists
- From: bobhanlon at aol.com (Bob Hanlon)
- Date: Tue, 22 Apr 2003 06:42:33 -0400 (EDT)
- References: <b80joq$m2n$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
m=3;
p1 = Table[{n[i],a[i]},{i,m}];
p2 = Table[{n[i],b[i]},{i,m}];
{#[[1,1]],f[#[[1,2]],#[[2,2]]]}& /@
Transpose[{p1,p2}]
or
Transpose[{p1,p2}] /.
{{n_,a_},{n_,b_}}:>{n,f[a,b]}
Bob Hanlon
In article <b80joq$m2n$1 at smc.vnet.net>, "Nathan Moore" <nmoore at physics.umn.edu>
wrote:
<<
Subject: defining a transform from two lists
From: "Nathan Moore" <nmoore at physics.umn.edu>
To: mathgroup at smc.vnet.net
Date: Mon, 21 Apr 2003 11:13:30 +0000 (UTC)
Suppose I have two lists of similar length,
p1={n[i],a[i]}
and
p2 = {n[i],b[i]}
and I'd like to create a new list,
p3 = { n[i], f[ a[i], b[i] ] }
if the new list comes from one parent list then it is relatively simple to
write and apply a transform w/ map like
h[{x_,y_}]:={x,f[y]}
newlist = h/@list or = Map[h,list]
but two parent lists confuse me
thanks again!
Nathan Moore,
University of Minnesota Physics
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