Patrick, Thanks for the suggestion. do you mean you need to change each row of the data frame into a text string using something like "paste(data[1,],collapse='\t')" and then output the resulting character vector into a file using writeLines?
It seems not working with my data mainly because my data is in a data frame, not in a matrix. even a single operation like "data[1,]" takes tremendous time to complete (I think it will be much easier and faster if my data is in a matrix). If anyone has suggestions, I would appreciate letting me know. Thanks anyway. --- Patrick Burns <[EMAIL PROTECTED]> wrote: > I had a similar problem not long ago. My solution > was to > look at the definition of "write.table" and > essentially do it > by hand. The key steps are to create a matrix of > characters > that includes the dimnames (if desired), and then > use > "writeLines" to put that into a file. > > My machine has 1G as well and my problem was a > numeric > matrix that was 5000 square. So you should have no > problem. > > Patrick Burns > > Burns Statistics > [EMAIL PROTECTED] > +44 (0)20 8525 0696 > http://www.burns-stat.com > (home of S Poetry and "A Guide for the Unwilling S > User") > > array chip wrote: > > >Hi, > > > >I am having trouble of exporting a large data frame > >out of R to be used in other purpose. The data > frame > >is numeric with size 17000x400. It takes a quite > some > >time to start R as well. my computer has 1GB RAM. I > >used the following command to write the data frame > to > >a text file and got the error message below: > > > > > > > >>write.table(xxx, "C:\\xxx", sep="\t", > >> > >> > >row.names=FALSE,col.names=FALSE,quote=FALSE) > > > >Error: cannot allocate vector of size 55750 Kb > >In addition: Warning message: > >Reached total allocation of 1023Mb: see > >help(memory.size) > > > >I tried to increase the memory size by > >memory.size(size=), but it seems running the above > >command takes forever. > > > >what can I do with this error message to get the > data > >out? > > > >Thanks > > > >______________________________________________ > >[EMAIL PROTECTED] mailing list > >https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > > > > > > > > > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
