Graphics Reference
In-Depth Information
If you want to draw a map of a region in the
world
map for which there isn't a separate map,
you can first look for the region name, like so:
sort(unique(world_map$region))
"Afghanistan"
"Albania"
"Algeria"
"American Samoa"
"Andaman Islands"
"Andorra"
"Angola"
"Anguilla"
"Antarctica"
...
"USA"
"USSR"
"Vanuatu"
"Venezuela"
"Vietnam"
"Virgin Islands"
"Vislinskiy Zaliv"
"Wales"
"West Bank"
"Western Sahara"
"Yemen"
"Yugoslavia"
"Zaire"
"Zambia"
"Zimbabwe"
# You might have noticed that it's a little out of date!
It's possible to get data for specific regions from a particular map (
Figure 13-33
):
east_asia
<-
map_data(
"world"
, region
=
c(
"Japan"
,
"China"
,
"North Korea"
,
"South Korea"
))
# Map region to fill color
ggplot(east_asia, aes(x
=
long, y
=
lat, group
=
group, fill
=
region))
+
geom_polygon(colour
=
"black"
)
+
scale_fill_brewer(palette
=
"Set2"
)
