Identifying a list of installed TERR / R packages and their versions.

Identifying a list of installed TERR / R packages and their versions.

An R package is a set of functionality for R or TERR that might not be included in the base installations of R or TERR. You may need to install additional R packages in order to create or use Spotfire analyses that include TERR Data Functions and/or TERR Expression Functions. For example, the TERR or R script used in a Spotfire data function may have been written to use functions from one or more of the user-contributed packages available from the open-source R community's CRAN repository (https://cran.r-project.org/).

A common source of issues in data functions is the use of different versions of such packages in different working environments. In a scenario where a data function works properly in one environment, but fails in another environment, a good first step in troubleshooting is to compare the versions of external packages installed in both environments. The following TERR script generates a listing of all installed packages and their versions:

ip <- as.data.frame(installed.packages()[,c(1,3:4)])
rownames(ip) <- NULL
ip <- ip[is.na(ip$Priority),1:2,drop=FALSE]
print(ip, row.names=FALSE)

These commands can be executed in both environments and available package versions can be compared in one go.

The following command will also generate a listing of all installed packages and their versions, but it includes all of the built-in core packages in its listing:

sapply( rownames(installed.packages()),
  function(X) paste(packageVersion(X), collapse = ".") )
  https://www.r-bloggers.com/list-of-user-installed-r-packages-and-their-versions/