Alfredo > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Alfredo > Alessandrini > Sent: Friday, 20 June 2008 10:56 a.m. > To: r-help@r-project.org > Subject: [R] colnames of a column > > Hi, > > With this data.frame: > > > class(rwl) > [1] "data.frame" > > >rwl > 0028002F 0028013F 0028032F > 1833 3.39 NA NA > 1834 3.09 NA NA > 1835 3.05 NA NA > 1836 3.31 NA NA > 1837 2.26 NA NA > > > colnames(rwl) > [1] "0028002F" "0028013F" "0028032F" > > Ok.... > > > colnames(rwl[,1]) > NULL > > why?? I expect: "0028002F"
Because rwl[,1] is a numeric vector and not a dataframe: is.data.frame(rwl[,1]) [1] FALSE You probably want names(rwl)[1] HTH .... Peter Alspach 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.
