& and |

Indeed!
I was just hoping that there would be a shorter way... intersect() is a
nice alternative too. Maybe I can make it work with pipes so that I
don't have to repeat "mydata" but that's another story.

Thank you for the 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

On 19/08/2020 17:31, Bert Gunter wrote:

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 at rgzm.de
<mailto:calandra at 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 at rgzm.de

    <mailto:calandra at rgzm.de>

    > <mailto:calandra at rgzm.de <mailto:calandra at 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 at r-project.org <mailto:R-help at r-project.org>

    <mailto:R-help at r-project.org <mailto:R-help at 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

    code.

    >