Re: defining a transform from two lists
- To: mathgroup at smc.vnet.net
- Subject: [mg40874] Re: defining a transform from two lists
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 22 Apr 2003 06:49:57 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <b80joq$m2n$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
here are two variants:
{#[[1, 1]], f[#[[1, 2]], #[[2, 2]]]} & /@ Transpose[{p1, p2}]
Join @@@ Transpose[{p1, Rest /@ p2}] /. {a_n, b__} :> {a, f[b]}
Regards
Jens
Nathan Moore wrote:
>
> 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