[R] PCA in predefined Groups??
CharlieTheBrown77 at gmail.com
Sat Mar 10 21:33:51 CET 2012
Without taking away all the fun of trial and error, and exploration in R... I
will direct you to this website which I found invaluable when I first began
to use R.
one way would be to use:
and then 3 text() or points() statements to plot the groups represented by
> This has a simple answer but it has been eluding me nonetheless.
> I have been trying to build a PCA plot from scratch with the ability to
> plot predefined groups in different colors. I can plot PCA but I want it
> to plot with predefined groups(samples) with top 100 expressed genes. I
> have three groups. Can any body help me keeping in mind that the user is
> just beginner in R.
> Thanks in advance
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