Hi again, Since yesterday I'm trying to use the normalizeWithinArrays function. I'm using a .csv file. I was able to do the background correction with no difficulties. But when I try to normalize, this is the message that I get: > MA = MA.RG(RG.mb) > MAp = normalizeWithinArrays(RG.mb) Error in switch(method, loess = { : printer layout information does not match M row dimension I understand what's going on, but I don't know what to do. Thanks again! Priscila -- Priscila Grynberg, B.Sc., M.Sc. Doutoranda em Bioinformática (Bioinformatics D.Sc student) Laboratório de Genética Bioquímica Universidade Federal de Minas Gerais Tel: +55 31 3409-2628 CV: http://lattes.cnpq.br/8808643075395963 [[alternative HTML version deleted]]

On Tue, Dec 23, 2008 at 10:44 AM, Priscila Grynberg <priscilag@gmail.com>wrote: > Dear Sean, > It worked! Thanks. > > Can you help me a little bit more? How do I specify the layout? I don't > have any examples to follow. > Priscila, it is a great idea to always reply to the whole list. The questions and answers are then archived for your later use and, more importantly, for everyone else to use. As for your question, you'll need to know the layout of your arrays. You didn't mention the type of array or the feature extraction software that you are using. And to the details, again, "help" can be your friend. If you start with the RGList-class help, you will see that there is a "printer" slot described. It suggests that you look at the help for the PrintLayout class. If you do help('PrintLayout-class'), you can hopefully find some useful information for setting up the layout if it makes sense to do so for your arrays. Sean [[alternative HTML version deleted]]