[R] Extracting a particular column from list

[Mark Leeds]

I nominate the last sentence of Rolf's comment as a fortune.


On Thu, Jan 16, 2020 at 3:48 PM Rolf Turner <r.turner using auckland.ac.nz> wrote:

>
> On 17/01/20 1:55 am, Rui Barradas wrote:
>
> > Hello,
> >
> > What column and what list?
> > Please post a reproducible example, see the link at the bottom of this
> > mail and  [1], [2], [3].
> >
> > [1] https://cran.r-project.org/web/packages/reprex/index.html
> > [2]
> >
> https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
> >
> > [3] https://stackoverflow.com/help/mcve
> >
> > Hope this helps,
>
> The OP should note that lists in general *do not have* columns.  Data
> frames (which are a special case of lists) do have columns.
>
> Lists have "*entries*" or "components".  It is important to get your
> terminology right and to understand the concepts that you are dealing
> with.  Slap-dash hammer and hope is a recipe for disaster, especially
> in R.
>
> cheers,
>
> Rolf Turner
>
> --
> Honorary Research Fellow
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
>
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>

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