How to find out which package version is loaded in R?

556    Asked by ConnorPeake in Data Science , Asked on Jun 16, 2021

 I am in the process of figuring out how to use my university cluster. It has 2 versions of R installed. System-wide R 2.11 (Debian 6.0) and R 2.14.2 in a non-standard location.

I am trying to use MPI together with snow. The code I am trying to run is the following

cl <- makeMPIcluster(mpi.universe.size()-1)

It works without the problems on R 2.11. (I launch the script with mpirun -H localhost,n1,n2,n3,n4 -n 1 R --slave -f code.R). Now when I try to do it with R 2.14.2, I get the following message:

Error: This is R 2.11.1, package 'snow' needs >= 2.12.1
In addition: Warning message:

So it seems that R loads the package snow version compiled for R 2.11. I've installed snow under R 2.14 into my home folder and I added the following lines to my code:


And the output before the error confirms that I am indeed running R 2.14.2 and my R packages folder is first in the search path. But I still get the error.

 So my question is how to check package version r? I can see with installed.packages all the packages which are installed, so maybe there is some function which lists similar information for loaded packages?

Answered by Celina Lagunas

To check package version R, you can use the packageVersion() function to print version information about the loaded packages.

For example:



  [1] ‘3.2.0’

To print the version information about R, the OS and attached or loaded packages, use the sessionInfo() function.



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