Apply Manual Clipping Mask
This function creates a manual clipping mask, which in turn suppresses the standard clipping mask that would otherwise
be rendered in the foregound rendering procedure, giving the user control over the exact placement with respect to
other layers. For example, the user may wish to have the clipping mask placed after
the geom_point(...) layer, but before the geom_label(...) layer, this situation has been
demonstrated in the example below. In the event that the user wishes to suppress the mask altogether, then a convenience
function has been provided, theme_nomask().
geom_mask()
Nicholas Hamilton
data(Feldspar) x = ggtern(Feldspar,aes(Ab,An,Or,label=Experiment)) + geom_point() #Default Behaviour x + geom_label() #Insert manual mask before the labels, to prevent them being truncated x + geom_point(size=6) + geom_mask() + geom_label()
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