old-classes | R Documentation |
Package "hexbin" now uses S4 classes throughout and hence
needs to setOldClass
both "unit"
and
"viewport"
(which are S3 classes from the grid package),
in order to be able to use those in slots of its own classes.
A virtual Class: No objects may be created from it.
Class "oldClass"
, directly.
No methods defined with class "unit" in the signature.
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