Re: opposite of partition
- To: mathgroup at smc.vnet.net
- Subject: [mg57554] Re: opposite of partition
- From: dh <dh at metrohm.ch>
- Date: Wed, 1 Jun 2005 06:01:40 -0400 (EDT)
- References: <d7han9$3r7$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Guy, you want to exchange level 2 and 3 and then Flatten: Transpose[t, {1, 3, 2}]//Flatten Note that you lost some elements by Partition, therefore in the results are some elements missing. Sincerely, Daniel Guy Israeli wrote: > Hi, > > How do I do the opposite of partition quickly? > > for example: > > l1= {{a, b, c, d, e}, {f, g, h, i, j}, {k, l, m, n, o}, {p, q, r, s, t}, {u, > v, w, > x, y}} > > and then if I partition it to blocks will result in > > {{{{a, b}, {f, g}}, {{c, d}, {h, i}}}, {{{k, l}, {p, q}}, {{m, n}, {r, s}}}} > > flattening it won't help, and its messy to do it by taking all first lines > of the blocks, then second.. > > How can I do it quickly? > > > > Thanks, > > Guy > >