[BioC] PCA plots

A.J. Rossini rossini@u.washington.edu
Mon, 27 Jan 2003 21:13:41 -0800


If you can get the SJava interface, you can do linked plots, brushing,
and grand tours on scatterplots (i.e. principle components).

The ROrca interface works pretty well these days, I just need more
time to clean up the docs.

best,
-tony

>>>>> "LG" == Laurent Gautier <laurent@cbs.dtu.dk> writes:

    LG> On Mon, Jan 27, 2003 at 11:29:39PM -0500, Michael Benjamin wrote:
    >> Hi, all.
    >> 
    >> Are there any plans to spice up the principal components analysis tools
    >> in R?  Many commercial packages offer interactive manipulation of 3D
    >> biplots.  We are almost there already, with a fast (if homely-looking)
    >> biplot in "princomp."  Any takers?

    LG> AFAIK, R can interface with ggobi. By linking selections of individuals
    LG> in different planes of projection, you should be able to achieve it
    LG> (and go beyond "only" 3 dimensions, if I understood what you meant
    LG> by "interactive manipulation").
    LG> Check the screenshots at www.ggobi.org to get an idea.


    LG> Hopin' it helps,


    LG> L.

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-- 
A.J. Rossini				Rsrch. Asst. Prof. of Biostatistics
U. of Washington Biostatistics		rossini@u.washington.edu	
FHCRC/SCHARP/HIV Vaccine Trials Net	rossini@scharp.org
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