The answer is yes, you can access rows of a data.frame by rowname in the same way as columns, which you could have found by merely trying it. Don't overlook the value of a little experimentation as the fastest way to an answer.
-- Bert Gunter Genentech > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Tony Plate > Sent: Wednesday, September 13, 2006 11:02 AM > To: Michael Gormley > Cc: r-help@stat.math.ethz.ch > Subject: Re: [R] Access Rows in a Data Frame by Row Name > > Matrix-style indexing works for both columns and rows of data frames. > > E.g.: > > x <- data.frame(a=1:5, b=6:10, d=11:15) > > x > a b d > 1 1 6 11 > 2 2 7 12 > 3 3 8 13 > 4 4 9 14 > 5 5 10 15 > > x[2:4,c(1,3)] > a d > 2 2 12 > 3 3 13 > 4 4 14 > > > > Time spend reading the help document "An Introduction to R" will > probably be well worth it. The relevant sections are "5 Arrays and > matrices", and "6.3 Data frames". > > -- Tony Plate > > Michael Gormley wrote: > > I have created a data frame using the read.table command. > I want to be able to access the rows by the row name, or a > vector of row names. I know that you can access columns by > using the data.frame.name$col.name. Is there a way to access > row names in a similar manner? > > > > [[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. > > > > ______________________________________________ > 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. > ______________________________________________ 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.