Hi, I am a very stupid beginner trying to get started and I am trying to figure out how to do probe level normalisations like RMA with Nimblegen arrays. Is there anybody out there with experience in Nimblegen arrays to give me the few lines of code to do RMA (or gcRMA) for Nimblegen probe level data? Cheers and sorry about such a basic question, Mikko Mikko Arvas VTT Biotechnology Please note new tel/fax number from start of year 2005. e-mail: mikko.arvas@vtt.fi tel: +358-(0)20-722 5827 mobile: +358-(0)44-381 0502 fax: +358 20 722 7071 mail: Tietotie 2, Espoo P.O. Box 1500 FIN-02044 VTT, Finland Protein production group's website: http://www.vtt.fi/bel/bpro/proteinprod/indexe.htm