Hello. I have a question concerning the use of the affy package and clustering, and was hopeing someone might be able to help me out. i'd like to be able to cluster my arrays as a quality control measure (to make sure that replicates cluster with each other, etc.) I'm relatively new to using R and the affy package, so if anyone could help me out, i'd appreciate it. thanks! -j ********************************** Joshua McElwee Department of Biology Darwin Building University College London Gower Street WC1E 6BT London United Kingdom Phone: +44 (0) 207 679 4394 Fax: +44 (0) 207 679 7096 Cellular: 0775 338 3321 Email: jmcelwee@u.washington.edu