Hi Sylvia, You may want to check this site for pointers: http://www.compbio.group.cam.ac.uk/Resources/GeneST/ Note that I didn't try this all myselves. HTH, Guido -----Original Message----- From: bioconductor-bounces@r-project.org [mailto:bioconductor- bounces@r-project.org] On Behalf Of Tippmann, Sylvia Sent: Thursday, February 02, 2012 12:27 To: bioconductor at stat.math.ethz.ch Subject: [BioC] GCRMA computing affinities error length(prlen) == 1 Hello, I do have exactly the same error and indeed I have probes with length 23 and one with length 21. How can I exclude or remove these probes? The array I'm using is: hugene10stv1probe / hugene10stv1cdf Thanks a lot for the help! Sylvia _______________________________________________ Bioconductor mailing list Bioconductor at r-project.org https://stat.ethz.ch/mailman/listinfo/bioconductor Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor