Like this? > V <- c("fee","fie","foe") > aq <- head(airquality) # Just to get a shorter example > aq[V] <- 0 > aq Ozone Solar.R Wind Temp Month Day fee fie foe 1 41 190 7.4 67 5 1 0 0 0 2 36 118 8.0 72 5 2 0 0 0 3 12 149 12.6 74 5 3 0 0 0 4 18 313 11.5 62 5 4 0 0 0 5 NA NA 14.3 56 5 5 0 0 0 6 28 NA 14.9 66 5 6 0 0 0
> On 22 Apr 2018, at 10:13 , Luca Meyer <lucam1...@gmail.com> wrote: > > Hi, > > I am a bit rusty with R programming and do not seem to find a solution to > add a number of variables to my existing dataframe. Basically I need to add > n=dim(d1)[1] variables to my d0 dataframe and I would like them to be named > V1, V2, V3, ... , V[dim(d1)[1]) > > When running the following code: > > for (t in 1:dim(d1)[1]){ > d0$V[t] <- 0 > } > > all I get is a V variable populated with zeros... > > I am sure there is a fairly straightforward code to accomplish what I need, > any suggestion? > > Thank you, > > Luca > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.