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Re: x and y labels in ArrayPlot

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  • Subject: [mg113734] Re: x and y labels in ArrayPlot
  • From: Bob Hanlon <hanlonr at>
  • Date: Tue, 9 Nov 2010 03:54:47 -0500 (EST)

Use FrameTicks with the ticks suppressed (zero length). I'm not sure where you want the labels since you say the rows are lower case but you want the xLabels (upper case) to the left (rows). Adjust the following as appropriate.

data = {{1, 2, 3}, {2, 3, 4}, {3, 4, 5}, {4, 5, 6}};
yLabels = {"axxx", "bxxx", "cxxx"};
xLabels = {"A", "B", "C", "D"};
ArrayPlot[data, FrameTicks -> {
      Table[0, {Length[xLabels]}]}],
      Rotate[#, 45 Degree] & /@ yLabels,
      Table[0, {Length[yLabels]}]}]}}]

Bob Hanlon

---- Gordon Robertson <grobertson at> wrote: 


I would like to plot an array of integer values, and to put labels on 
each row (a,c,b) and column (A,B,C) of the array, with x-labels on the 
left and y-labels above and potentially rotated by 45 or 90 degrees. 
ArrayPlot seems appropriate, but I do not see how to add the labels. 
I've tried to check the Help documentation carefully, including 
MatrixPlot and alternatives, and the WRI demonstrations.

data = {{1, 2, 3},
   {2, 3, 4},
   {3, 4, 5}}
yLabels = {"a", "b", "c"}
xLabels = {"A", "B", "C"}

Thanks for your help.

Gordon Robertson
BC Cancer Agency Genome Sciences Centre
Vancouver BC Canada

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