On Mon, 21 Nov 2005, Uwe Ligges wrote: > Barry Baker wrote: > >> Hello, >> >> I am a new R user and have two datasets that I would like to analyze. The >> first is (2409222 x 17) and the other is (21682998 x 17). Is this possible >> in R? If not then what is the maximum number of rows and columns or number >> of elements that R can handle? > > > The number of columns and rows is not a problem here, but you will need > 21682998 * 17 * 4 bytes to store the latter matrix (assuming floats) in > memory, that is 1406.139 Mb.
R does not use floats internally. So unless these are integers/logicals you are going to need twice that, > In order to do something sensible with the data, you need *at least* > twice the amount of RAM, hence at least 3Gb. Here I think the issue is rather virtual memory and address space. You will need a 64-bit OS to do anything with this object. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
