Hi I use SCAN UPC package in adenocarcinoma with 200 samples on HGU133.2.plus. I applied the standardization available in SCAN UPC.( thanks to Steve Piccolo and Johnson's lab for that!) However, I have a simple question to improve my understanding. The values generated by SCAN()function is logged or unlogged? Using the documentation, or this link (http://grokbase.com/t/r/bioconductor/12abzc6zky/bioc-expression- values-for-scan-upc),  I haven't a good and precise answer. My feeling is : the values is unlogged Thanks for your help Greg Montreal [[alternative HTML version deleted]]