Displaying 1 result from an estimated 1 matches for "desiredpackages".
2015 Dec 01
1
Package Dependency
...t installed so
the install fails.
I see this a lot with students who are able to install packages like
ggplot2 but then can't load it because a dependency "stringi" is
missing. Those students are generally using Windows, but today I
reproduced the same on RedHat Linux with R-3.2.2.
desiredPackages is a big vector of packages to install. This is using
a trick that one of R Core taught me about 15 years ago...
> installedPackages <- rownames (installed.packages() )
> alreadyHave <- desiredPackages %in% installedPackages
> install.packages(desiredPackages[!alreadyHave],
+...