Description Usage Details Value
This function is called by individual grob functions to
combine data, defaults and aesthetic parameters. It
throws away all aesthetics not used by the geom, but does
not check that all required aesthetics are present: these
may be added by geom_data
which is called
after calc_aesthetics
.
1 | calc_aesthetics(geom, data)
|
A list is returned so that constant aesthetics don't need
to be needlessly repeated - the recycling can occur
internally in grid. geom_grob
methods should try
and maintain this structure where possible.
a list
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