This is needed because 'unit(NULL, "inches")' gives an error, whereas we want 'NULL'.
1 2 3 | safe_unit(x, units)
safe_arrow(angle, length, ends = "last", type = "closed")
|
x |
Size of 'grid::unit()' object |
units |
Units of 'grid::unit()' object |
angle |
Angle of arrow created by 'grid::arrow()' |
length |
Length of arrow created by 'grid::arrow()' |
ends |
See '?grid::arrow()' |
type |
See '?grid::arrow()' |
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