p1982[sample(nrow(p1982),200000),]
On 12/8/06, Aimin Yan <[EMAIL PROTECTED]> wrote: > > I have a data set like this: > if I want to less than 200000 obs from this data set. > How can I do these? > > > str(p1982) > 'data.frame': 465979 obs. of 6 variables: > $ p : Factor w/ 1982 levels "154l_aa","1A0P_aa",..: 1 1 1 1 1 1 1 1 1 1 > ... > $ aa : Factor w/ 19 levels "ALA","ARG","ASN",..: 2 16 4 5 18 3 19 3 2 9 > ... > $ as : num 152.0 15.9 65.1 57.2 28.9 ... > $ ms : num 108.8 28.3 59.2 49.9 31.8 ... > $ cur: num -0.1020 0.2564 0.0312 -0.0550 0.0526 ... > $ sc : num 92.10 103.67 7.27 72.98 96.12 ... > > ______________________________________________ > 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 > and provide commented, minimal, self-contained, reproducible code. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.
