It’s sometimes faster to ask from someone who has already learnt the syntax.
In this case one has to do e.g.
names(data$somecol)
To get the collection and then iteration through it is almost like in Python:
for(i in names(data$somecol)) {
# do something
}
> Bert Gunter <bgunter.4...@gmail.com> kirjoitti 6.11.2017 kello 19.55:
>
> Time to go through a tutorial or two! -- This forum cannot replace such self
> study.
>
> Your query evidences some basic confusion, but ?tapply or the equivalent
> lapply(split(...)) construct are most likely relevant.
>
> Cheers,
> Bert
>
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along and
> sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
> On Mon, Nov 6, 2017 at 9:40 AM, mviljamaa <mvilja...@kapsi.fi
> <mailto:mvilja...@kapsi.fi>> wrote:
> How can I do a for loop that does to a data.frame column what:
>
> for x in xs:
>
> does in Python?
>
> Obviously the data.frame column in question holds "levels". What if the
> data.frame is in matrix form?
>
> BR, Matti
>
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