Alternatively you could also drop the column like this: xx$x2<-NULL
On Wed, Apr 15, 2009 at 15:51, Peter Alspach <palsp...@hortresearch.co.nz> wrote: > Tena koe Erin > > xx[, names(xx)!='x2'] > > HTH .... > > Peter Alspach > >> -----Original Message----- >> From: r-help-boun...@r-project.org >> [mailto:r-help-boun...@r-project.org] On Behalf Of Erin Hodgess >> Sent: Wednesday, 15 April 2009 5:39 p.m. >> To: R help >> Subject: [R] excluding a column from a data frame >> >> Dear R People: >> >> Suppose I have the following data frame: >> >> x1 x2 x3 >> 1 -0.1582116 0.06635783 1.765448 >> 2 -1.1407422 0.47235664 0.615931 >> 3 0.8702362 2.32301341 2.653805 >> > str(xx) >> 'data.frame': 3 obs. of 3 variables: >> $ x1: num -0.158 -1.141 0.87 >> $ x2: num 0.0664 0.4724 2.323 >> $ x3: num 1.765 0.616 2.654 >> >> I can exclude the second column nicely via: >> > xx[,-2] >> x1 x3 >> 1 -0.1582116 1.765448 >> 2 -1.1407422 0.615931 >> 3 0.8702362 2.653805 >> >> Now suppose I wanted to exclude the column called "x2". If I try: >> > xx[,-"x2"] >> Error in -"x2" : invalid argument to unary operator >> > >> >> things don't work. Is there a simple way to do this by name >> rather than number, please? >> >> Thanks, >> Erin >> >> >> >> -- >> Erin Hodgess >> Associate Professor >> Department of Computer and Mathematical Sciences University >> of Houston - Downtown >> mailto: erinm.hodg...@gmail.com >> >> ______________________________________________ >> 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 confidential and may be subject to legal > privilege. > If you are not the intended recipient you must not use, disseminate, > distribute or > reproduce all or any part of this e-mail or attachments. If you have > received this > e-mail in error, please notify the sender and delete all material pertaining > to this > e-mail. Any opinion or views expressed in this e-mail are those of the > individual > sender and may not represent those of The New Zealand Institute for Plant and > Food Research Limited. > > ______________________________________________ > 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. > ______________________________________________ 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.
