Hello,

   I would like to ask what to do if there are outlying microarrays on PCA
plot. Should I remove them from the further analysis or not?
   I have two groups of samples and these groups are clearly separated on
the PCA plot (first and second PC). But a few microarrays are not in the
"correct" group.
   What to do in a situation that one of the samples is much different from
all the others (but technically it as a good microarray)? What would you do
in such a situation?

Sincerely,
Theresa

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