Graphics Reference
In-Depth Information
Figure 4-13. Left: line graph with constant size and color; right: with supp mapped to colour, and
with points added
See Also
For more information about using colors, see
Chapter 12
.
Changing the Appearance of Points
Problem
You want to change the appearance of the points in a line graph.
Solution
In
geom_point()
, set the
size
,
shape
,
colour
, and/or
fill
outside of
aes()
(the result is
shown in
Figure 4-14
):
ggplot(BOD, aes(x
=
Time, y
=
demand))
+
geom_line()
+
geom_point(size
=
4
, shape
=
22
, colour
=
"darkred"
, fill
=
"pink"
)