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Re: de-nesting complex nested lists

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111269] Re: de-nesting complex nested lists
  • From: Norbert Marxer <marxer at mec.li>
  • Date: Sun, 25 Jul 2010 07:46:53 -0400 (EDT)
  • References: <i2gjui$am$1@smc.vnet.net>

On Jul 25, 8:00 am, Michael Stern <nycst... at gmail.com> 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

Hello

Try
     list = {{1, 2, 3}, {1, 2, 4}, {{1, 2, 3, 4}, {1, 2, 3, 8}},
            {{1, 2, 9}, {{1, 2, 13}, {4, 5, 6}}}};

     Cases[list, x_ /; VectorQ[x] == True, Infinity]
or
     Extract[list, Position[list, x_ /; VectorQ[x] == True]]

Best Regards
Norbert Marxer


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