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Old 07-10-2014, 01:27 AM   #6
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Location: Germany

Join Date: Apr 2012
Posts: 215

1) You used a symmetric color key.
2) You have a datapoint (RMS.T11 / 343867) which has a z-score of ~8
Both result in a color map ranging from -8 to 8 to which the rest of your data is assigned to.

You can set the symkey parameter to false to make an unsymmetric key. Also playing with a different color gradient (as suggest by jwfoley) makes sense in my opinion. I mean, you see the separation of genes of your BL.C group and the RMS group in comparison to EWS and each other, so it's just a matter of fine tuning the contrast <- if that is what you want to show
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