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MathGroup Archive 2012

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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125914] How to Invert Rows and Columns for a Grid of List of Lists
  • From: brtubb at pdmusic.org
  • Date: Fri, 6 Apr 2012 06:02:16 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

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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