Everyone:
Using multiple resources I've been able to create a state (Kentucky) map that
shows all 120 counties, with two selected counties highlighted in red.
Fine, except - I also want to show the names of the two selected counties,
likely as labels.
Any ideas on how to achieve this aim would be greatly appreciated.
The code shows below.
Best wishes.
Tom
library(ggplot2)
library(ggthemes)
library(ggmap)
library(maps)
library(mapdata)
ls()
rm(list=ls(all=TRUE))
ls()
# U.S. States
states <- map_data("state")
head(states)
str(states)
ky_df <- subset(states, region == "kentucky")
head(ky_df)
str(states)
# U.S. Counties
counties <- map_data("county")
ky_county <- subset(counties, region == "kentucky")
head(ky_county)
str(ky_county)
ky_base <- ggplot2::ggplot(data = ky_df,
mapping = aes(x = long, y = lat, group = group)) +
coord_fixed(1.3) +
geom_polygon(color = "black", fill = "aliceblue")
par(ask=TRUE); ky_base # Map of Kentucky with no counties, yet
par(ask=TRUE)
ky_base +
geom_polygon(data = ky_county, fill = NA, color = "black") +
geom_polygon(color = "black", fill = NA) # Map of Kentucky with counties
# Select Pike County and Warren County as subregions
multiple_county_ky <- subset(ky_county, subregion=="pike" | subregion=="warren")
# Create a map with Pike County and Warren County in red
ky_base +
labs(title = "Kentucky Counties of Importance to the Study") +
geom_polygon(data = ky_county, fill = NA, color = "black") +
geom_polygon(color = "black", fill = NA) +
geom_polygon(data = multiple_county_ky, fill = "red", color = "white") +
theme_void()
# But how can I add the county name as a label to the two
# selected counties, Pike County and Warren County?
----------
Thomas W. MacFarland, Ed.D.
Senior Research Associate; Institutional Effectiveness and Associate Professor
Nova Southeastern University
Voice 954-262-5395 tom...@nova.edu<mailto:tom...@nova.edu>
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