[BioC] heatmap.2 Z scores

Thomas Hampton Thomas.H.Hampton at Dartmouth.edu
Thu Oct 8 03:08:03 CEST 2009

When you use the scaling capabilities of heatmap.2, the
resulting plot heatmap shows a legend that says

"Column Z scores" or

"Row Z scores".

The scaling looks as though the values have been normalized
to SD units.

z = (x - mean)/sd

Is this what heatmap.2 means by a Z score?

I am finding it tricky to reproduce their results using
the z value above.



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