[R] Q and R mode in Principal Component Analysis

[Steve Lianoglou]

Hi,

2011/9/6 Lívio Cipriano <lcipriano at iol.pt>:
> Hi,
>
> Can anyone explain me the differences in Q and R mode in Principal Component
> Analysis, as performed by prcomp and princom respectively.

Perhaps this tutorial will help?

http://www.uga.edu/strata/software/pdf/pcaTutorial.pdf

Search that pdf for "q-mode" if you don't need to go through the intro.

-steve

-- 
Steve Lianoglou
Graduate Student: Computational Systems Biology
 | Memorial Sloan-Kettering Cancer Center
 | Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact