Hi everybody, How do I ask R what non-standard (Bioconductor) libraries I have installed? Thank you, Ivan Ivan Gregoretti, PhD National Institute of Diabetes and Digestive and Kidney Diseases National Institutes of Health 5 Memorial Dr, Building 5, Room 205. Bethesda, MD 20892. USA. Phone: 1-301-496-1016 Fax: 1-301-496-9878