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MathGroup Archive 2012

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Re: How to Invert Rows and Columns for a Grid of List of Lists

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125921] Re: How to Invert Rows and Columns for a Grid of List of Lists
  • From: "Harvey P. Dale" <hpd1 at nyu.edu>
  • Date: Sat, 7 Apr 2012 05:56:19 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201204061002.GAA23061@smc.vnet.net>

	Transpose[a]
	Best,
	Harvey


-----Original Message-----
From: brtubb at pdmusic.org [mailto:brtubb at pdmusic.org]
Sent: Friday, April 06, 2012 6:02 AM
To: mathgroup at smc.vnet.net
Subject: [mg125921] How to Invert Rows and Columns for a Grid of List of
Lists

Consider two lists

a = {{1,2,3},{4,5,6},{7,8,9}};
b = {{1,4,7},{2,5,8},{3,6,9}};

I want to transform a "into" b for use in a project for displaying chord
diagrams in a GraphicsGrid. the list values will be used to indicate
ArrayPlot scale fingering "dots" for any given tuning. The Riffle
function would seem to be the most likely candidate, other than a "brute
force" user defined function to do a rules table.




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