[R] Wild cards for dataframes

[Grzegorz Smoliński]

Well, Wikipedia is probably the place where people who know some topic
can check if people who wrote the article did it right :)

You can try this short subchapter in R for Data Science (by Hadley
Wickham) as a starting point:

https://r4ds.had.co.nz/strings.html#matching-patterns-with-regular-expressions

Best regards,
Grzegorz


pt., 22 paź 2021 o 15:14 Eric Berger <ericjberger using gmail.com> napisał(a):
>
> You can check out Wikipedia for regular expressions:
>
> https://en.wikipedia.org/wiki/Regular_expression
>
>
>
>
> On Fri, Oct 22, 2021 at 3:48 PM Steven Yen <styen using ntu.edu.tw> wrote:
>
> > Thanks, it works!
> >
> > What can I read to understand more about this part "\\..*$" of the
> > pattern? And more such as ^ and $ that I know from experience?
> >
> > On 2021/10/22 下午 06:22, Rui Barradas wrote:
> > > Hello,
> > >
> > > Use ls() with argument pattern. It accepts a regex and returns a
> > > vector of objects names matching the pattern.
> > >
> > >
> > > rm(list = ls(pattern = "data\\..*$"))
> > >
> > >
> > > Hope this helps,
> > >
> > > Rui Barradas
> > >
> > > Às 10:20 de 22/10/21, Steven Yen escreveu:
> > >> I like to be able to use a command with something similar to a "wild
> > >> card". Below, lines 4 works to delete all three dataframes, but line
> > >> 5 does not work. Any elegant way to accomplish this? My list of
> > >> dataframes can be long and so this would be convenient.
> > >>
> > >> data.1<-data.frame(x=1:3,y=4:6,z=7:9)
> > >> data.2<-data.1
> > >> data.3<-data.1
> > >> rm(data.1,data.2,data.3)
> > >> rm(data.*)
> > >>
> > >> ______________________________________________
> > >> R-help using 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.
> >
> > ______________________________________________
> > R-help using 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.
> >
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help using 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.