Graphics Reference
In-Depth Information
Figure 4-14. Points with custom size, shape, color, and fill
Discussion
The default
shape
for points is a solid circle, the default
size
is 2, and the default
colour
is
"black"
. The
fill
color is relevant only for some point shapes (numbered 21-25), which have
separate outline and fill colors (see
Using Diferent Point Shapes
for a chart of shapes). The fill
color is typically
NA
, or empty; you can fill it with white to get hollow-looking circles, as shown
in
Figure 4-15
:
ggplot(BOD, aes(x
=
Time, y
=
demand))
+
geom_line()
+
geom_point(size
=
4
, shape
=
21
, fill
=
"white"
)
