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Old 08-23-2013, 03:20 AM   #2
Location: RTP, NC, USA

Join Date: Jun 2009
Posts: 28

Use the 'breaks' parameter of the heatmap.2() function. Set it to a vector of values representing where the color breaks should be. I think you need n+1 breaks for colors, but in this rare case the error message will guide you. Just be sure to use a color vector one fewer length than the breaks. Not too hard once you get it working, and it's much more powerful that way.
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