Re: de-nesting complex nested lists
- To: mathgroup at smc.vnet.net
- Subject: [mg111290] Re: de-nesting complex nested lists
- From: Peter Breitfeld <phbrf at t-online.de>
- Date: Mon, 26 Jul 2010 06:38:52 -0400 (EDT)
- References: <i2gjui$am$1@smc.vnet.net>
Michael Stern wrote:
> If one has an irregularly nested list like
>
> {{1, 2, 3}, {1, 2, 4}, {{1, 2, 3, 4}, {1, 2, 3, 8}}, {{1, 2, 9}, {{1,
> 2, 13}, {4, 5, 6}}}},
>
> How might one most easily transform this into a list of uniform Depth
> 2 ( {{1,2,3},{1,2,4},{1,2,3,4},{1,2,3,8},{1,2,9},{1,2,13},{4,5,6}} ) ?
>
> Thanks in advance,
>
> Michael
>
One possibility is to extract the list of vectors like this
ll={{1, 2, 3}, {1, 2, 4}, {{1, 2, 3, 4}, {1, 2, 3, 8}},
{{1, 2, 9}, {{1, 2, 13}, {4, 5, 6}}}}
uniform=Cases[ll,_?VectorQ, Infinity]
Out={{1, 2, 3}, {1, 2, 4}, {1, 2, 3, 4}, {1, 2, 3, 8}, {1, 2, 9},
{1, 2, 13}, {4, 5, 6}}
--
_________________________________________________________________
Peter Breitfeld, Bad Saulgau, Germany -- http://www.pBreitfeld.de