Hi,

I would like to understand how the filter of low expression tags works. If
I run the command

>keep <- rowSums (cpm(d)>100) >=2
d <- d[keep,]
dim(d)

as in the use guide page 32, this means that I am using a cutoff of 100cpm,
but how are treated the 2 samples? Did are they averaged and then the low
tags are removed?
Is each sample considered separate and filtered by itself?
Thanks foe the help in advance


Vittoria Roncalli

-- 

Vittoria Roncalli

Graduate Research Assistant
Center Békésy Laboratory of Neurobiology
Pacific Biosciences Research Center
University of Hawaii at Manoa
1993 East-West Road
Honolulu, HI 96822 USA

Tel: 808-4695693

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