Inline
----- Original Message -----
> From: "Ivan Calandra" <calan...@rgzm.de>
> To: "R-help" <r-help@r-project.org>
> Sent: Wednesday, 19 August, 2020 16:56:32
> Subject: [R] combine filter() and select()
> Dear useRs,
>
> I'm new to the tidyverse world and I need some help on basic things.
>
> I have the following tibble:
> mytbl <- structure(list(files = c("a", "b", "c", "d", "e", "f"), prop =
> 1:6), row.names = c(NA, -6L), class = c("tbl_df", "tbl", "data.frame"))
>
> I want to subset the rows with "a" in the column "files", and keep only
> that column.
>
> So I did:
> myfile <- mytbl %>%
> filter(grepl("a", files)) %>%
> select(files)
>
> It works, but I believe there must be an easier way to combine filter()
> and select(), right?
I would write
mytbl %>%
filter(grepl("a", files)) %>%
select(files) -> myfile
as I like to keep a sort of "top to bottom and left to right" flow when writing
in the tidyverse dialect of R but that's really not important.
Apart from that I think what you've done is "proper tidyverse". To me another
difference between the dialects is that classical R often seems to put value
on, and make it easy, to do things with incredible few characters. I think the
people who are brilliant at that sort of coding, and there are many on this
list, that sort of coding is also easy to read. I know that Chinese is easy to
read if you grew up on it but to a bear of little brain like me, the much more
verbose style of tidyverse repays typing time with readability when I come back
to my code and, though I have little experience of this yet, when I read other
poeple's code.
What did you think wasn't "easy" about what you wrote?
Very best (all),
Chris
>
> Thank 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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--
Small contribution in our coronavirus rigours:
https://www.coresystemtrust.org.uk/home/free-options-to-replace-paper-core-forms-during-the-coronavirus-pandemic/
Chris Evans <ch...@psyctc.org> Visiting Professor, University of Sheffield
<chris.ev...@sheffield.ac.uk>
I do some consultation work for the University of Roehampton
<chris.ev...@roehampton.ac.uk> and other places
but <ch...@psyctc.org> remains my main Email address. I have a work web site
at:
https://www.psyctc.org/psyctc/
and a site I manage for CORE and CORE system trust at:
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I have "semigrated" to France, see:
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If you want an Emeeting, I am trying to keep them to Thursdays and my diary is
at:
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Beware: French time, generally an hour ahead of UK.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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