Following Simon's example dat <- data.frame(d=rnorm(3), c=rnorm(3), b=rnorm(3), a=rnorm(3)) dat dat<-subset(dat, select=c(d,a,b,c)) dat Bests
milton brazil=toronto On Thu, May 21, 2009 at 12:02 AM, Simon Blomberg <s.blombe...@uq.edu.au>wrote: > How about to insert a variable a2 inbetween the first and second columns > of dat: > > dat2 <- cbind(dat[,1], a2=a2, dat[,2:3]) > > Where a2 is the new variable. This mangles the variable name for column > 1, unfortunately. Surely someone else will offer a better solution. > > Simon. > > > On Wed, 2009-05-20 at 20:39 -0700, pgseye wrote: > > Thanks Simon, > > > > I should have explained myself better (although I didn't know about the > > order function so that's handy information). > > > > I've found a few times, I've added variables to a dataframe that I would > > like to 'group' with variables earlier in the datset. So I was wondering > if > > you could somehow ask R, for example, to take that last variable and > insert > > it at a different position in the dataframe. > > > > Thanks, > > > > Paul > > > > Simon Blomberg-4 wrote: > > > > > > Alphabetically, like this?: > > > > > >> dat <- data.frame(d=rnorm(3), c=rnorm(3), b=rnorm(3), a=rnorm(3)) > > >> dat > > > d c b a > > > 1 -0.1816733 -0.4106008 -0.2855991 -1.022951 > > > 2 -1.8326818 -0.6515208 0.3344884 -2.191836 > > > 3 1.0924867 0.1159611 -1.3409719 1.195545 > > >> dat2 <- dat[,order(names(dat))] > > >> dat2 > > > a b c d > > > 1 -1.022951 -0.2855991 -0.4106008 -0.1816733 > > > 2 -2.191836 0.3344884 -0.6515208 -1.8326818 > > > 3 1.195545 -1.3409719 0.1159611 1.0924867 > > >> > > > > > > Cheers, > > > > > > Simon. > > > > > > On Wed, 2009-05-20 at 20:19 -0700, pgseye wrote: > > >> This is no doubt a very basic question for most R users, but is there > an > > >> easy > > >> way to reorder the variables (columns) in a dataframe (I can't seem to > > >> find > > >> an answer anywhere). I've generally been creating a new dataframe and > > >> selecting the new order I want from the old but this is > time-consuming. > > >> > > >> Thanks, > > >> > > >> Paul > > > -- > > > Simon Blomberg, BSc (Hons), PhD, MAppStat. > > > Lecturer and Consultant Statistician > > > School of Biological Sciences > > > The University of Queensland > > > St. Lucia Queensland 4072 > > > Australia > > > Room 320 Goddard Building (8) > > > T: +61 7 3365 2506 > > > http://www.uq.edu.au/~uqsblomb > > > email: S.Blomberg1_at_uq.edu.au <http://s.blomberg1_at_uq.edu.au/> > > > > > > Policies: > > > 1. I will NOT analyse your data for you. > > > 2. Your deadline is your problem. > > > > > > The combination of some data and an aching desire for > > > an answer does not ensure that a reasonable answer can > > > be extracted from a given body of data. - John Tukey. > > > > > > ______________________________________________ > > > 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<http://www.r-project.org/posting-guide.html> > > > and provide commented, minimal, self-contained, reproducible code. > > > > > > > > > -- > Simon Blomberg, BSc (Hons), PhD, MAppStat. > Lecturer and Consultant Statistician > School of Biological Sciences > The University of Queensland > St. Lucia Queensland 4072 > Australia > Room 320 Goddard Building (8) > T: +61 7 3365 2506 > http://www.uq.edu.au/~uqsblomb > email: S.Blomberg1_at_uq.edu.au <http://s.blomberg1_at_uq.edu.au/> > > Policies: > 1. I will NOT analyse your data for you. > 2. Your deadline is your problem. > > The combination of some data and an aching desire for > an answer does not ensure that a reasonable answer can > be extracted from a given body of data. - John Tukey. > > ______________________________________________ > 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<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[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.
