Re: Noah's List
- To: mathgroup at smc.vnet.net
- Subject: [mg5687] Re: Noah's List
- From: killough at convex.com
- Date: Sat, 11 Jan 1997 14:28:56 -0500
- Organization: Convex Technology Center of Hewlett Packard, Richardson, Tx USA
- Sender: owner-wri-mathgroup at wolfram.com
In article <5atsld$ssn at dragonfly.wolfram.com>,
Hans Havermann <haha at astral.magic.ca> wrote:
>I have two lists, x and y, each containing n elements. I would like to
>generate a new list, {{x[[1]],y[[1]]}, {x[[2]],y[[2]]},...
>{x[[n]],y[[n]]}}, but have been unable to figure out a shorthand for it.
>Any help would be much appreciated.
Thread[{x,y}]
??Thread
Thread[f[args]] ``threads'' f over any lists that appear in args.
Thread[f[args], h] threads f over any objects with head h that appear in
args. Thread[f[args], h, n] threads f over objects with head h that appear
in the first n args. Thread[f[args], h, -n] threads over the last n args.
Thread[f[args], h, {n, m}] threads over arguments n through m.
Attributes[Thread] = {Protected}
Lee