Presuming that 'DF' is the data frame, I am not sure what is wrong with NewDF <- subset(DF, (age >= 20) & (age <= 30))
presuming that 20 and 30 are to be included. ? Marc Schwartz On Jan 12, 2012, at 9:26 PM, R. Michael Weylandt wrote: > You can probably do it more easily with the subset() function but in > my experience that often leads to more problems than solutions: > perhaps try this. > > idx <- with(DATA, which(age > 20 & age < 30)) > DATA[idx, ] > > Michael > > On Thu, Jan 12, 2012 at 5:25 PM, manu79 <manuelespin...@hotmail.it> wrote: >> Hello, >> I have a big dataset with many variables and I would like to consider only >> the rows in which there is a specific value of a variable. >> >> I make an example for explain what I mean: >> I have 5 variables describing a person: age, sex, weight, colour of hair, >> colour of eyes. >> I have 1000 rows (1000 persons) and I want to consider only the persons >> whose age is between 20 to 30. How can I do? >> >> Thank you very much >> M. ______________________________________________ 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.
