Dear Tony, Much will depend on what information you need from the output of installed.packages()?
Best regards, ir. Thierry Onkelinx Statisticus / Statistician Vlaamse Overheid / Government of Flanders INSTITUUT VOOR NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE AND FOREST Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance thierry.onkel...@inbo.be Havenlaan 88 bus 73, 1000 Brussel www.inbo.be /////////////////////////////////////////////////////////////////////////////////////////// To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey /////////////////////////////////////////////////////////////////////////////////////////// <https://www.inbo.be> Op do 12 okt 2023 om 14:34 schreef Tony Wilkes <tony_a_wil...@outlook.com>: > Dear all, > > In my R package that I'm developing, I use `installed.packages(priority = > "base")` to programmatically get all core/base R packages (i.e. base, > stats, etc.). And similarly, I use installed.packages(priority = > "recommended")` to programmatically get the recommended R packages (i.e. > mgcv, lattice, etc.). > > However, CRAN has requested to not use `installed.packages()`, as it is > slow. I fully get and agree with that assesment. I used > installed.packages()` anyway because I could not find a better, fool-proof > alternative. > > Nonetheless, I was asked to change this code for optimalisation. So I > would like to ask: how do I programmatically get all base/core R packages > safely and efficiently, but without using `installed.packages()`? And the > same question for recommended R packages. I have of course Googled it, and > looked at R's documentation (though R's documentation is large, so it's > easy to miss something); no solution found. So if any of you has a smart > idea: I'm all ears. > > Thank you in advance. > > Kind regards, > > Tony. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel > [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
