rmnppt

library(ggplot2)
library(magrittr)
library(dplyr)
library(maps)

data("world.cities")

world.cities %>% 
  filter(country.etc == "UK") %>% 
ggplot(aes(x = long, y = lat, alpha = pop)) + 

rmnppt

# process shapefile data
library(rgdal) # requires sp, will use proj.4 if installed
library(gpclib)
library(maptools)
library(ggplot2)
library(plyr)

gpclibPermit()
shpToDf <- function(directory, layer) {
  map <- readOGR(dsn=directory, layer=layer)