[BioC] PCA scree plot question

[Naomi Altman]

Y=variance of component

units are measurement units^2

--Naomi

At 10:05 AM 6/16/2009, you wrote:
>Can anyone tell me what the units of the numbers on the Y-axis of the
>PCA plot are? I think its the number of genes involved in that
>particular component but maybe someone can tell me for sure? See here
>for an example of what I'm talking about:
>
>http://frink.nuigalway.ie/~pat/PCAScreePlotNorm.pdf
>
>Thanks alot,
>
>-Paul.
>
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Naomi S. Altman                                814-865-3791 (voice)
Associate Professor
Dept. of Statistics                              814-863-7114 (fax)
Penn State University                         814-865-1348 (Statistics)
University Park, PA 16802-2111