[BioC] two questions associated with heatmap
oh, i mean how it defines the group? i just want to confirm if it is based on the whole matrix?
On 9/23/06, Sean Davis <sdavis2 at mail.nih.gov> wrote:
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
Weiwei Shi, Ph.D Research Scientist GeneGO, Inc. "Did you always know?" "No, I did not. But I believed..." ---Matrix III