Load a package, installing it first if necessary

Attempts to load pkg; if it is not installed, installs it (from CRAN by default) and then loads it. require.force is an alias for library.force.

Usage

library.force(pkg, ...)

require.force(pkg, ...)

Arguments

pkg

name of the package to load or install

...

further arguments passed to install.packages

Value

Invisibly returns NULL; called for the side effect of loading (and possibly installing) pkg.