Hi kawai, This is a suggestion. I am not sure how well it will work but You could try using microarray data of the same chip type from previously published work if the only aim of your experiment is to look at the artifacts in your chips using the affyPLM package. Swati Swati Ranade Center for Genomic Research Harvard University 7 Divinity Ave Cambridge MA 02138 USA --- t-kawai@hhc.eisai.co.jp wrote: > > Hello Swati, > > Thank you for your e-mail. > But I cannot imagine what shall I do. Is your > message a suggestion or a > requirement for me? > > May I have the name of your affiliation? > > > > Hi Kawai, > > > > I think you might be able to generate a dummy > training > > set from Published microarray data!! > > > > Swati > > > ------------------------------------------------------- > > >