Rod Staggs wrote: > I am trying to work with 75 affymetrix U133plus2 chips and am running into > memory allocation errors when trying to merge or convert probe level data to > expression values.
You don't say what package(s) you are using to do this, but assuming you are using the affy package, this is not the correct list - you should be using the BioC list ([EMAIL PROTECTED]). To answer your question, there are several possibilities. 1.) Get more RAM (if on windows, start R with --max-mem-size=<amount of RAM>) 2.) Use justRMA() 3.) If on Windows, switch to *nix. The memory allocation is better, so you can analyze more chips with the same amount of RAM. Probably the easisest way to do this is with Quantian, which runs off a CD. Best, Jim > > I keep getting - Error: cannot allocate vector of size 561011 Kb and that is > simply with a data subset. > > Is there a way around this limitation? > -- James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
