Dear list, I have a MAList and I want to exclude probes that show a standard deviation above 0.1 between the replicate values. The number of within-array replicates for each probe (ndups) is equal to 2 and the number of spots to step from a probe to its duplicate (spacing) is equal to 1. I am not able to to this. Can somebody give me some a hint to resolve this? Best regards Jo?o Fadista Ph.d. student UNIVERSITY OF AARHUS Faculty of Agricultural Sciences Research Centre Foulum Dept. of Genetics and Biotechnology Blichers All? 20, P.O. BOX 50 DK-8830 Tjele Phone: +45 8999 1900 Direct: +45 8999 1900 E-mail: Joao.Fadista at agrsci.dk <mailto:joao.fadista at="" agrsci.dk=""> Web: www.agrsci.org <https: djfpost.agrsci.dk="" exchweb="" bin="" redir.a="" sp?url="&lt;a href=" http:="" www.agrsci.org="" "="" rel="nofollow">http://www.agrsci.org/"> ________________________________ News and news media <https: djfpost.agrsci.dk="" exchweb="" bin="" redir.asp?u="" rl="&lt;a href=" http:="" www.agrsci.org="" navigation="" nyheder_og_presse"="" rel="nofollow">http://www.agrsci.org/navigation/nyheder_og_presse"> . This email may contain information that is confidential. Any use or publication of this email without written permission from Faculty of Agricultural Sciences is not allowed. If you are not the intended recipient, please notify Faculty of Agricultural Sciences immediately and delete this email.