Great!
Thanks to both of you! Sincerely, Erin On Wed, Apr 15, 2009 at 12:54 AM, Coen van Hasselt <coenvanhass...@gmail.com> wrote: > 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. >> > -- 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.
