[BioC] two questions associated with heatmap

Sean Davis sdavis2 at mail.nih.gov
Sat Sep 23 17:30:04 CEST 2006

Sean Davis wrote:
> Weiwei Shi wrote:
>> hi, there:
>> i have 2 questions associated with heatmap
>> in heatmap.2{gplot}, there is a bar called "raw z-score" showing the
>> coloring legend for each pixel. Where can I find that z-score's
>> formulae?
> A Z-score is the mean of the group divided by the standard deviation.
It's a bit late--what I meant to say is that the z-score is the ("actual 
value" minus the mean of the group) divided by the standard deviation.


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