[BioC] how to select on Present calls in 2 out of 5 chips

[Andreas Zankl]

I want to filter my expression data to accept only genes that have 
the MAS5 "present" call in at least 2 out of 5 samples. How could I 
do that? I know there are ALL and ANY commands in R, is there 
something like a SOME or AT_LEAST command?

Thanks
Andreas

-- 
PLEASE NOTE MY NEW EMAIL ADDRESS: ANDREAS.ZANKL at GMAIL.COM

--------------------------
Andreas Zankl, MD
Division of Molecular Pediatrics
Clinique Infantile 02/50
CHUV
Avenue Pierre Decker 2
CH-1011 Lausanne
Switzerland
Phone: +41-21-3143778
Fax: +41-21-3143546
Email: andreas.zankl at gmail.com