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I'm trying to write some SPARQL queries in R using the rrdf package. However, I get this error every time I try to load the library.
Error: package 'rrdflibs' 1.1.2 was found, but == 1.1.0 is required by 'rrdf'
Not sure why they didn't write it as >= 1.1.0. Is what they did a good programming practice?
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Right-click the file or folder, and then select Restore previous versions. You'll see a list of available previous versions of the file or folder. The list will include files saved on a backup (if you're using Windows Backup to back up your files) as well as restore points, if both types are available.
Installing an older package from source If you know the URL to the package version you need to install, you can install it from source via install. packages() directed to that URL. If you don't know the URL, you can look for it in the CRAN Package Archive.
To install a specific version of a package, we need to install a package called “remotes” and then load it from the library. Afterwards we can use install_version() by specifying the package name and version needed as shown below.
Go to http://cran.r-project.org/src/contrib/Archive/rrdflibs/ to retrieve an older version. This is a source archive, so you will have to be able to build from source (typically easy on Linux, pretty easy on MacOS, and hard on Windows; you can use the http://win-builder.r-project.org/ service to build a Windows binary if necessary).
Actually, based on a quick look at the package, I think you should be able to install in this case (even on Windows without Rtools) via
download.file("http://cran.r-project.org/src/contrib/Archive/rrdflibs/rrdflibs_1.1.0.tar.gz",
dest="rrfdlibs_1.1.0.tar.gz")
install.packages("rrfdlibs_1.1.0.tar.gz",repos=NULL,type="source")
because the package doesn't actually contain anything that needs to be compiled.
Don't know about programming practice, you'd have to ask the authors if they had some particular reason to do it that way. (See maintainer("rrdf").) Maybe they knew the versions would not be backward/forward compatible?
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