Probably discussed already, but what is the difference between using “::” and “ImportFrom”? I usually use ImportFrom and “::” just to make clear, where the function is coming from - is this a problem?
Rainer > On 7 Aug 2018, at 11:14, Uwe Ligges <lig...@statistik.tu-dortmund.de> wrote: > > ... and even if you are importing from several packages, you should import > selective via importFrom directoves. > > If you need two functions with identical names, import at most one of them > and rather use pkg::foo syntax to access them. > > Best, > Uwe Ligges > > > > > > On 07.08.2018 10:14, Iñaki Úcar wrote: >> El mar., 7 ago. 2018 a las 9:32, Gianmarco Alberti >> (<gianmarcoalbe...@gmail.com>) escribió: >>> >>> I am building a R package, and I am facing an issue caused (as far as I >>> understand) by the fact that some functions out of my package rely on two >>> fuctions having the same name and coming from 2 different packages: >>> >>> pROC::roc >>> spatstat::roc >>> >>> When checking the package via devtools::check(), I get the following >>> warning: >>> >>> Warning: replacing previous import ‘spatstat::roc’ by ‘pROC::roc’ when >>> loading ‘GmAMisc’ >>> >>> Note that both packages are listed among the Imports in my package's >>> DESCRIPTION file, and that (within my functions) I have actually used >>> spatstat::roc and pROC::roc where needed. >> I see: >> Depends: R (>= 3.4.0), ggplot2, ggrepel, rgdal, rgeos, raster, sp, >> spatstat, maptools, spatialEco, dismo, pROC, kimisc, corrplot, >> InPosition, lsr, gridExtra, caTools, plyr, classInt, coin, DescTools, >> rWind, shape, rworldmap, cluster, RcmdrMisc, gdistance, Hmisc >> In general, it is not a good idea to depend on so many packages, >> because what "Depends" do is to load and attach packages. Among other >> issues, there is one that you are already experimenting: "roc" is >> exported both by "spatstat" and "pROC", so one masks the other. >> The solution is to list them under "Imports" instead of "Depends". In >> fact, my advice is to put as many packages as possible under >> "Imports". Keep in "Depends" only those you would load and attach >> anyway when working with your package, because you need all the >> functions along with the ones your package exports. For the rest of >> them, just use them as package::function to avoid this kind of >> problem, and reexport functions selectively if needed. >> Iñaki >> PS: I'm taking a look at other packages and I see that you always use >> "Depends" and never "Imports". My general advice is against this >> practice. Moreover, from the "Writing R Extensions" manual: >> "Field ‘Depends’ should nowadays be used rarely, only for packages >> which are intended to be put on the search path to make their >> facilities available to the end user (and not to the package itself): >> for example it makes sense that a user of package 'latticeExtra' would >> want the functions of package 'lattice' made available." >>> >>> I have done some web-search but I could not locate any workaround that >>> actually fixes my issue. >>> >>> Do you have any suggestion on the matter? >>> >>> ************************************** >>> Dr Gianmarco Alberti (PhD) >>> (currently) >>> Research Support Officer II >>> Department of Classics and Archaeology >>> Faculty of Arts >>> University of Malta >>> >>> (starting from 3rd September 2018) >>> Lecturer in Spatial Forensics >>> Department of Criminology >>> Faculty for Social Wellbeing >>> University of Malta >>> https://www.researchgate.net/profile/Gianmarco_Alberti4 >>> http://cainarchaeology.weebly.com/ >>> ************************************** >>> >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-package-devel@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-package-devel >> ______________________________________________ >> R-package-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-package-devel >> > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) University of Zürich Cell: +41 (0)78 630 66 57 email: rai...@krugs.de Skype: RMkrug PGP: 0x0F52F982
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