Groups > comp.soft-sys.math.mathematica > #3126

Partition a list based on columns

From	StatsMath <stats.math8@gmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Partition a list based on columns
Date	2011-06-16 08:02 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<itcdai$d13$1@smc.vnet.net> (permalink)

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Hi All,

I am looking for help in partition a list based on columns. For ex,
given a list {{3,1},{2,4}}, I want to sort it and then partition it
along columns.

So for the given example, I want the answer to be, {{1,3},{2,4}}.

Right now If I try, Partition[Sort[Flatten[{{3,1},{2,4}}]]],2], I get
{{1,2},{3,4}}.

Looking at doc for Partition[], it doesn't seem to support aligning
rows on columns. I can do it in a For[] loop, but that seems un-
mathematica like, is there a good functional way to do this??

------------

What would be a good way to line up elements in a list in a diagonal
fashion, for ex: from Range[9] want to create the follwing matrix:

1 2 4
3 5 7
6 8 9

Thanks in advance!

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Thread

Partition a list based on columns StatsMath <stats.math8@gmail.com> - 2011-06-16 08:02 +0000
  Re: Partition a list based on columns Ray Koopman <koopman@sfu.ca> - 2011-06-16 10:24 +0000
  Re: Partition a list based on columns Ray Koopman <koopman@sfu.ca> - 2011-06-17 04:09 +0000
  Re: Partition a list based on columns Ray Koopman <koopman@sfu.ca> - 2011-06-17 04:06 +0000
  Re: Partition a list based on columns DrMajorBob <btreat1@austin.rr.com> - 2011-06-17 09:52 +0000

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