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 > > > > ______________________________________________ > > 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. > > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
