RFC: 'igraph' package update and backward compatibility

On Thu, 20 Oct 2011, Hadley Wickham wrote:

The optimal solution would be if R packages could depend on a specific
version of a package, and a user could have multiple packages

You used to be able to have a versioned install of a package, and then
load a particular version. Not sure when it was removed.

See the NEWS files.

Anyway, it was always intended for development purposes only. You can 
still install various versions into separate libraries and explicitly 
load from such libraries.  Both, the removed feature and my suggested 
workaround were/are *not* intended for "production use".

Best,
Uwe Ligges

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