Helper function that installs sp when missing, from a tarball.
Usage
install_sp(force = FALSE)
Arguments
- force
A logical indicating whether the installation should be forced
Details
The "sp" package should be unloaded from the namespace when it is not needed anymore.
Every function that uses "sp" should start with a call to this function.
And end with a call to unloadNamespace("sp").
This is because the "sp" package is known to cause conflicts with other packages.