Hi, I tried to create using the arrayQualityMetrics package a report on 16 chips but my pc (32 bit machine with 2 GB of Ram) reports memory problems. Does somebody have an idea of the requirements of a PC able to analyze such a number of chips? Thank you Simona [[alternative HTML version deleted]]

On Tue, Jul 15, 2008 at 1:34 PM, simona dalle carbonare <simona.dallecarbonare at="" gmail.com=""> wrote: > Hi, > I tried to create using the arrayQualityMetrics package a report on 16 chips > but my pc (32 bit machine with 2 GB of Ram) reports memory problems. Does > somebody have an idea of the requirements of a PC able to analyze such a > number of chips? Hello, again, Simona. There are a HUGE number of posts in the bioconductor archives regarding memory issues and affymetrix arrays. You could certainly search the archives for more information. However, by using the aroma.affymetrix package or using justRMA and justGCRMA, you should be able to process that number of arrays on a modest PC. As for quality control, you can typically do that in smaller batches if necessary, as many of the affy quality metrics are calculated on a per-chip basis. Sean