Hi! Is it posible to read not only the mean intensity but the STDEV from a cel files using functions from affy package ? Searching in the mailing list it seem that read.celfile could do it but I didnt find the function (I imagine that it was from an ancient version) Any hint will be very much appreciate it thanks, Mayte -- Mayte Suarez Farinas The Rockefeller University 1230 York Avenue, Box 212 New York, NY 10021 phone: 1-212-327-8186 fax: 1-212-327-7422