Will report the version number of a requested installed package
Usage
package.version(pkg, lib.loc = NULL)
Arguments
pkg
The name of the package
lib.loc
a character vector describing the location of R library trees
to search through, or `NULL'. The default value of `NULL'
corresponds to all libraries currently known.
Value
A character string reporting the version number.
Details
This function is a convenience wrapper around
package.description, and will report simply the version number
of the requested package. If the package does not exist or if the
DESCRIPTION file can not be read, then an error will be thrown.