Hi, Well, how did you make that little 10 row sample for us? The same subsetting principles hold in R regardless of hugeness. I am kind of assuming you have a matrix or data frame class object, in which case, here is a little example for you:
## Big matrix dat <- matrix(1L, nrow = 134000, ncol = 4) ## somewhat smaller matrix dat2 <- dat[60000:90000, ] ## Show the objects' dimensions dim(dat) dim(dat2) ## show their size object.size(dat) object.size(dat2) ## For documentation see ?"[" Cheers, Josh On Sun, Feb 13, 2011 at 10:01 PM, kparamas <[email protected]> wrote: > > Hi, > > I have a huge table with 134,000 entries. I want to choose only rows 60,000 > to 90,000. > Please help me on how to do this. > > V1 V2 V3 V4 > 1 31.10267 168.3204 41 0.4 > 2 31.19941 168.1488 41 0.4 > 3 31.29580 167.9764 41 0.4 > 4 31.39183 167.8034 41 0.4 > 5 31.48750 167.6297 41 0.4 > 6 31.58280 167.4553 41 0.4 > 7 31.67774 167.2803 41 0.4 > 8 31.77229 167.1045 41 0.4 > 9 31.86648 166.9281 41 0.4 > 10 31.96028 166.7510 41 0.4 > .... > -- > View this message in context: > http://r.789695.n4.nabble.com/Selecting-particular-rows-in-a-table-tp3304488p3304488.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > [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 > and provide commented, minimal, self-contained, reproducible code. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
