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Rolling up some integers

  • To: mathgroup at
  • Subject: [mg33404] Rolling up some integers
  • From: "DIAMOND Mark R." <dot at>
  • Date: Wed, 20 Mar 2002 01:53:10 -0500 (EST)
  • Organization: The University of Western Australia
  • Sender: owner-wri-mathgroup at

Can anyone see an easy way of  putting a fiven list of n^2 integers into an
n*n matrix along the diagonals---could be either not-snaking (preferred)
snaking. The *ordering*, but not necessarily the integers themselves, would

1 3 6
2 5 8
4 7 9

I would call this non-snaking, or  the following, snaking.

1 2 6
3 5 7
4 8 9

Please note,.

It occurred to me that this might be possible by first partitioning into
ascending and descending size lists representing each diagonal, but aside
from constructing an explicit secondary matrix of indices, I can't see
another way of doing it.


Mark R. Diamond
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