[R] & and |

[Bert Gunter]

Well... wouldn't it be:

rep("(ConfoMap.*GuineaPigs)|(GuineaPigs.*ConfoMap)", mydata, value=TRUE)

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 8:23 AM Ivan Calandra <calandra using rgzm.de> wrote:

> Thank you Bert for the pointer.
>
> So I guess the solution is:
> grep("ConfoMap.+GuineaPigs", mydata, value=TRUE)
>
> This is not the case here, but what if "GuineaPigs" comes before
> "ConfoMap"?
> Of course I could do two "grep()" calls, but if there a better solution?
>
> 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 17:07, Bert Gunter 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 <calandra using rgzm.de
> > <mailto:calandra using 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
> >
> >     ______________________________________________
> >     R-help using r-project.org <mailto:R-help using r-project.org> mailing list --
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> >     PLEASE do read the posting guide
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> >     and provide commented, minimal, self-contained, reproducible code.
> >
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
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