Karen For indices, use the minus sign: yourData[-indicesToBeDeleted,]
For rownames, negate %in%: yourData[!rownames(yourData)%in%namesToBeDeleted,] HTH Peter Alspach > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Chang Liu > Sent: Friday, 15 February 2008 9:50 a.m. > To: r-help@r-project.org > Subject: [R] deleting certain observations in a data frame > > > Hi, I'm wondering what the fastest way is to delete certain > data points (observations) in a data frame. > I have a vector of the indices/row.names I would like to > delete. I have tried replacing list by list, but it always > complains about different lengths, "replacing list of length > a with length b" and so on. > > Another way to think of it is that it's a generazation of > na.rm I guess. > > Thanks, > Karen > _________________________________________________________________ > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > The contents of this e-mail are privileged and/or confidential to the named recipient and are not to be used by any other person and/or organisation. If you have received this e-mail in error, please notify the sender and delete all material pertaining to this e-mail. ______________________________________________ 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.