A data frame is a special case of a list. It is a list of its columns. > is.list( your_data_frame )
# TRUE On Tue, Mar 31, 2020 at 4:04 PM Ivan Calandra <calan...@rgzm.de> wrote: > Dear useRs, > > I have a very simple question: > On a simple data.frame (i.e. each element is a vector), ncol() and > length() will give the same result. > > Are they just equivalent on such objects, or are they differences in > some cases? > Is one of them to be preferred for whatever reason? > > Thanks you, > Ivan > > -- > Dr. Ivan Calandra > TraCEr, laboratory for Traceology and Controlled Experiments > MONREPOS Archaeological Research Centre and > Museum for Human Behavioural Evolution > Schloss Monrepos > 56567 Neuwied, Germany > +49 (0) 2631 9772-243 > https://www.researchgate.net/profile/Ivan_Calandra > > ______________________________________________ > 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. > [[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.
