A version of Eric's answer is to use grepl(), which returns a logical vector:
mydata[grepl("ConfoMap", mydata) & grepl("GuineaPigs", mydata)]
with the OR analogue:
mydata[grepl("ConfoMap", mydata) | grepl("GuineaPigs", mydata)]
/Henrik
On Wed, Aug 19, 2020 at 8:24 AM Ivan Calandra <calan...@rgzm.de> wrote:
>
> Thank you Eric, I didn't think about intersect().
>
> Now I'm trying to do that in tidyverse with pipes, and I think that's
> too much for me for now!
>
> 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
>
> On 19/08/2020 17:17, Eric Berger wrote:
> > mydata[ intersect( grep("ConfoMap", mydata), grep("GuineaPigs",
> > mydata) ) ]
> >
> >
> >
> > On Wed, Aug 19, 2020 at 6:13 PM Bert Gunter <bgunter.4...@gmail.com
> > <mailto:bgunter.4...@gmail.com>> wrote:
> >
> > "&" is not a regex metacharacter.
> > See ?regexp
> >
> > 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 Wed, Aug 19, 2020 at 7:53 AM Ivan Calandra <calan...@rgzm.de
> > <mailto:calan...@rgzm.de>> wrote:
> >
> > > Dear useRs,
> > >
> > > I feel really stupid, but I cannot understand why "&" doesn't
> > work as I
> > > expect, while "|" does.
> > >
> > > I have the following vector:
> > > mydata <- c("SSFA-ConfoMap_GuineaPigs_NMPfilled.csv",
> > > "SSFA-ConfoMap_Lithics_NMPfilled.csv",
> > > "SSFA-ConfoMap_Sheeps_NMPfilled.csv",
> > "SSFA-Toothfrax_GuineaPigs.xlsx",
> > > "SSFA-Toothfrax_Lithics.xlsx", "SSFA-Toothfrax_Sheeps.xlsx")
> > > and I want to find the values that include both "ConfoMap" and
> > > "GuineaPigs".
> > >
> > > If I do:
> > > grep("ConfoMap&GuineaPigs", mydata, value=TRUE)
> > > it returns an empty vector, character(0).
> > >
> > > But if I do:
> > > grep("ConfoMap|GuineaPigs", mydata, value=TRUE)
> > > it returns all the elements that include either "ConfoMap" or
> > > "GuineaPigs", as I would expect.
> > >
> > > So what is wrong with my "&" construct? How can I return the
> > elements
> > > that include both parts?
> > >
> > > Thank you for your help!
> > > 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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> > > PLEASE do read the posting guide
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> > > and provide commented, minimal, self-contained, reproducible code.
> > >
> >
> > [[alternative HTML version deleted]]
> >
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>
> ______________________________________________
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