Re: Obtaining sequences from lists of lists
- To: mathgroup at smc.vnet.net
- Subject: [mg36232] Re: Obtaining sequences from lists of lists
- From: "Allan Hayes" <hay at haystack.demon.co.uk>
- Date: Tue, 27 Aug 2002 02:07:52 -0400 (EDT)
- References: <akco7s$50e$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Bob,
Apply[Sequence,{{a,b},{c,d}}]
Sequence[{a,b},{c,d}]
Outer[F,Apply[Sequence,Table[{a,b},{3}]]]
{{{F[a,a,a],F[a,a,b]},{F[a,b,a],F[a,b,b]}},{{F[b,a,a],F[b,a,b]},
{F [b,b,a],F[b,b,b]}}}
---
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565
"Bob" <rdobrow at carleton.edu> wrote in message
news:akco7s$50e$1 at smc.vnet.net...
> Can anyone help me with this problem.
>
> If I have an n-element list, (say where each element is itself a
> list), such as {{a,b}, {a,b}, {a,b}}
> is there a way to strip off the outermost nesting of the list to
> obtain just a sequence of of these n elements, that is
> {a,b},{a,b},{a,b} so that I can use this for input for some function.
>
> I would like to do something like
> Outer[SomeFunction, Table[{a,b},{N} ]] where I can enter N
> dynamically.
> The problem, of course, is that the output of the Table command is one
> big list
> and Outer is expecting a sequence of N separate lists after
> SomeFunction.
>
> Thanks for your help in advance.
>