basicmap.r

doInstall <- TRUE
toInstall <- c("maps", "ggplot2")
if(doInstall){install.packages(toInstall, repos = "http://cran.us.r-project.org")}
lapply(toInstall, library, character.only = TRUE)
library(ggplot2)
library(maps)

Prison <- read.csv("http://www.oberlin.edu/faculty/cdesante/assets/downloads/prison.csv")
head(Prison)

all_states <- map_data("state")
all_states
head(all_states)
Prison$region <- Prison$stateName
Total <- merge(all_states, Prison, by="region")
head(Total)
Total <- Total[Total$region!="district of columbia",]



p <- ggplot()
p <- p + geom_polygon(data=Total, aes(x=long, y=lat, group = group, fill=Total$bwRatio),colour="white"
      ) + scale_fill_continuous(low = "thistle2", high = "darkred", guide="colorbar")
P1 <- p + theme_bw()  + labs(fill = "Black to White Incarceration Rates \n Weighted by Relative Population" 
                            ,title = "State Incarceration Rates by Race, 2010", x="", y="")
P1 + scale_y_continuous(breaks=c()) + scale_x_continuous(breaks=c()) + theme(panel.border =  element_blank())