Re: [R] [BioC] two questions associated with heatmap

From: Sean Davis <sdavis2_at_mail.nih.gov>
Date: Sat 23 Sep 2006 - 15:30:04 GMT

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.

Sean



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