Please use a current version of R: they are much better at this! write.table was rewritten in R 2.1.0 to use *much* less memory.
There _is_ a `R Data Import/Export Manual' that dicsusses this. write.table was designed to write `tables' (data frames) not matrices. write.matrix (package MASS) does a much better job of the latter, memory-wise, in particular allowing the use of blocks. That _is_ on the help page for write.table in your version of R. Assuming this is a numeric matrix, it is taking up 373MB of storage. It is not too surprising that you are having problems manipulating it on a 1GB machine: my 1GB machine ended up swapping just creating such a matrix. On Wed, 20 Jul 2005, David Ruau wrote: > Hi All, > > I want to print a square matrix of 7000 x 7000 into a text file. But I > got a error after few hours of computation... > -------- > > write.table(MyDistMxDF, file = "temp.csv", sep=",", quote=F) > *** malloc: vm_allocate(size=8421376) failed (error code=3) > *** malloc[2889]: error: Can't allocate region > Error: vector memory exhausted (limit reached?) > *** malloc: vm_allocate(size=8421376) failed (error code=3) > *** malloc[2889]: error: Can't allocate region > > q() > *** malloc: vm_allocate(size=8421376) failed (error code=3) > *** malloc[2889]: error: Can't allocate region > *** malloc: vm_allocate(size=8421376) failed (error code=3) > *** malloc[2889]: error: Can't allocate region > Error in lazyLoadDBfetch(key, datafile, compressed, envhook) : > internal error in decompress1 > > > ------ > I am running R 2.0.1 on MacOS X 10.3 with 1Gb ram. > How could I write such a matrix to a text file. -- 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 ______________________________________________ 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
