I worked with Affy SNP chips 4 years ago. I don't know if they are just the same now, but they were quite similar to the expression chips with data stored in .cel and .cdf files in a very similar format. I imagine that many of the functions in the Affy package could be very quickly adapted to SNP chips, if they don't work already. Has anyone tried to make a SNP cdf environment and then use read.affybatch? Leslie Cope

I just tried to make an environment, which was successful. However, I don't have any .cel files to try read.affybatch. If anybody has a SNP .cel file or two that they can part with, please let me know. Conversely, I could send the environment to anybody who wants it. Jim James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623 >>> "Leslie M. Cope" <cope@mts.jhu.edu> 09/12/03 09:44AM >>> I worked with Affy SNP chips 4 years ago. I don't know if they are just the same now, but they were quite similar to the expression chips with data stored in .cel and .cdf files in a very similar format. I imagine that many of the functions in the Affy package could be very quickly adapted to SNP chips, if they don't work already. Has anyone tried to make a SNP cdf environment and then use read.affybatch? Leslie Cope _______________________________________________ Bioconductor mailing list Bioconductor@stat.math.ethz.ch https://www.stat.math.ethz.ch/mailman/listinfo/bioconductor