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 <calan...@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 <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 > > > > ______________________________________________ > > R-help@r-project.org <mailto: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. > > > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.