Best way to check/assert a certain version of [R] or a package

[Prof Brian Ripley]

On Fri, 25 Jan 2002, Henrik Bengtsson wrote:

[...]

> What is the easiest way to retrieve the version string of a certain package.
> Should one find the path to the package, then load the DESCRIPTION file and
> parse it?

Take a look at packageStatus, which uses package.description and
compareVersion.  package.dependencies can be used to test the R version
at present, at least.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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