Thank you, those are all viable solutions.
Regards
Luigi
On Wed, Nov 30, 2022 at 8:59 PM Rolf Turner <r.tur...@auckland.ac.nz> wrote:
>
>
> On Wed, 30 Nov 2022 13:40:50 +0100
> Luigi Marongiu <marongiu.lu...@gmail.com> wrote:
>
> > Hello,
> > I have a data frame where some lines containing strings including
> > digits. How do I select those rows and change their values?
> >
> > In essence, I have a data frame with different values assigned to the
> > column "val". I am formatting everything to either "POS" and "NEG",
> > but values entered as number should get the value "NUM".
> > How do I change such values?
> >
>
> What I do in such circumstances:
>
> suppressWarnings(X$val[!is.na(as.numeric(X$val))] <- "NUM")
>
> The "suppressWarnings()" bit is just included due to my OCD.
>
> This avoids fooling about with regular expressions, which always
> requires a huge amount of trial and error, and a great diminishment of
> the amount of hair on one's head (as a result of tearing out).
>
> Note that I have changed the name of your data frame from "df" to "X",
> since df() is a built-in R function (density of the F-distribution).
>
> See fortunes::fortune("might clash").
>
> cheers,
>
> Rolf Turner
>
> --
> Honorary Research Fellow
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
>
--
Best regards,
Luigi
______________________________________________
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.
