That's exactly why I was asking if it really is equivalent and if there are issues using one function or the other
-- 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 On 31/03/2020 15:39, Eric Berger wrote: > Yes it does because length(list) gives you the number of elements of > the list. And in the case of a data frame object that is the number of > columns, or ncol(). > > On Tue, Mar 31, 2020 at 4:37 PM Ivan Calandra <calan...@rgzm.de > <mailto:calan...@rgzm.de>> wrote: > > Thanks Eric, > > I know that, but that doesn't really answer my question, does it? > > 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 > > On 31/03/2020 15:26, Eric Berger wrote: > > 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 > <mailto:calan...@rgzm.de> > > <mailto:calan...@rgzm.de <mailto: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 <mailto:R-help@r-project.org> > <mailto:R-help@r-project.org <mailto: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. > > > > ______________________________________________ > R-help@r-project.org <mailto: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. > ______________________________________________ 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.
