On Thu, Jan 8, 2009 at 3:12 AM, Gundala Viswanath <gunda...@gmail.com> wrote: > Dear all, > > I found that printing with 'cat' is very slow. > > For example in my machine this snippet > > __BEGIN__ > > # I need to resolve to use this type of loop. > # because using write(), I need to create a matrix which > # consumes so much memory. Note that "foo, bar, qux" object > # is already very large (>2Gb) > > for ( s in 1:length(x) ) { > cat(as.character(foo[s]),"\t",bar[s],"\t", qux[s],"\n") > } > __END__ > > for "x" of size ~1.5million, takes more than 10 hours to print. > On my Linux 1994.MHz AMD processor.
But that's nothing compared to how long it will take you to read it. > > Is there any faster alternatives to "cat" ? What are you trying to achieve? Writing the data to file? Something like this? strs <- paste(as.character(foo), bar, qux, sep="\t"); writeLines(strs, con="foo.txt"); See also help(write.table) and friends. /Henrik > > > - Gundala Viswanath > Jakarta - Indonesia > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.