Thanks a lot, it's very helpful! Dimitri On Tue, Aug 3, 2010 at 1:53 PM, Duncan Murdoch <murdoch.dun...@gmail.com> wrote: > On 03/08/2010 1:10 PM, Dimitri Liakhovitski wrote: >> >> I understand the question I am about to ask is rather vague and >> depends on the task and my PC memory. However, I'll give it a try: >> >> Let's assume the goal is just to read in the data frame into R and >> then do some simple analyses with it (e.g., multiple regression of >> some variables onto some - just a few - variables). >> >> Is there a limit to the number of columns of a data frame that R can >> handle? I am asking because where I work many use SAS and they are >> running into the limit of >~13,700columns there. >> >> Since I am asking - is there a limit to the number of rows? >> >> Or is the correct way of asking the question: my PC's memory is X. The >> .txt tab-delimited file I am trying to read in has the size of YYY Mb, >> can I read it in? >> > > Besides what Jim said, there is a 2^31-1 limit on the number of elements in > a vector. Dataframes are vectors of vectors, so you can have at most 2^31-1 > rows and 2^31-1 columns. Matrices are vectors, so they're limited to 2^31-1 > elements in total. > This is only likely to be a limitation on a 64 bit machine; in 32 bits > you'll run out of memory first. > > Duncan Murdoch >
-- Dimitri Liakhovitski Ninah Consulting www.ninah.com ______________________________________________ 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.
