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}} ) ?
>
>
> 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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