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MathGroup Archive 2005

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Re: opposite of partition

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57592] Re: [mg57539] opposite of partition
  • From: Chris Chiasson <chris.chiasson at gmail.com>
  • Date: Wed, 1 Jun 2005 06:04:26 -0400 (EDT)
  • References: <200505310900.FAA03466@smc.vnet.net>
  • Reply-to: Chris Chiasson <chris.chiasson at gmail.com>
  • Sender: owner-wri-mathgroup at wolfram.com

What is the command you are using to partition it to blocks?

On 5/31/05, Guy Israeli <guyi1 at netvision.net.il> 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
> 
> 
> 


-- 
Chris Chiasson
http://chrischiasson.com/
1 (810) 265-3161


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