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A general description is here.
It is intended that this version will be released as R 3.0.0.
Packages need to have been installed under this version of R. (Pro tem, this is considered to be R-devel from April 2012.)
‘loadNamespace()’ allows a version specification to be given, and this is used to check version specifications given in the ‘Imports’ field when a namespace is loaded.
‘termplot()’ gains a new argument ‘plot = FALSE’ which returns information to allow the plots to be modified for use as part of other plots, but does not plot them. (Contributed by Terry Therneau, PR#15076.)