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.

**References**:**How to Invert Rows and Columns for a Grid of List of Lists***From:*brtubb@pdmusic.org