Re: List re-arrangement question
- To: mathgroup at smc.vnet.net
- Subject: [mg87773] Re: List re-arrangement question
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Wed, 16 Apr 2008 22:31:23 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <fu4fkm$nip$1@smc.vnet.net>
Yaroslav Bulatov wrote:
> I'm trying to do something like the following:
> Transpose[{{{a1, a2, a3}, {a1}, {a1, a2, a3}}, {{b1, b2, b3}, {b1},
> {b1, b2, b3}}}, {3, 1, 2}]
>
> expecting to get:
> {{{a1, b1}, {a2, b2}, {a3, b3}}, {{a1, b1}}, {{a1, b1}, {a2, b2}, {a3,
> b3}}}
>
> However, it looks like Transpose doesn't work with "ragged"
> arrays...so what is the recommended Mathematica style to do the above
> transformation?
Here are some possible ways:
rag={{{a1,a2,a3},{a1},{a1,a2,a3}},{{b1,b2,b3},{b1},{b1,b2,b3}}};
Thread /@ Thread@rag
MapThread[Thread[{##}] &, rag]
MapThread[Transpose[{##}] &, rag]
{{{a1,b1},{a2,b2},{a3,b3}},{{a1,b1}},{{a1,b1},{a2,b2},{a3,b3}}}
{{{a1,b1},{a2,b2},{a3,b3}},{{a1,b1}},{{a1,b1},{a2,b2},{a3,b3}}}
{{{a1,b1},{a2,b2},{a3,b3}},{{a1,b1}},{{a1,b1},{a2,b2},{a3,b3}}}
Regards,
-- Jean-Marc