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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: [mg125920] Re: How to Invert Rows and Columns for a Grid of List of Lists
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Sat, 7 Apr 2012 05:55:58 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

On 4/6/12 at 6:02 AM, brtubb at pdmusic.org wrote:

>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

Use Transpose, that is

In[4]:= a = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
b = {{1, 4, 7}, {2, 5, 8}, {3, 6, 9}};
b == Transpose[a]

Out[6]= True




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