[R] ncol() vs. length() on data.frames

[Eric Berger]

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 <calandra using 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
>
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