问题描述
有许多解决方案可以在国家/地区级别上绘制地图，但就我而言，我想在大陆级别上打印统计信息.
There are many solutions to plot maps at country level, but in my case I want to print statistics at continent level.
我想到的唯一一件事就是使用国家/地区地图并使用每个大陆的国家/地区列表，但是我想知道这种地图是否有任何简单的解决方案.要实现我的想法，将是这样的:
The only thing that comes into my mind is to use the country level maps and use a list of countries for each continent, but I was wondering if there is any simple solution for this kind of maps. To implement my idea it would be like this:
## produce the world map
map()
## list of countries per continent
SA <- c("argentina", "bolivia", "brazil", "chile", "colombia", "ecuador", "guyana", "paraguay", "peru", "suriname", "uruguay", "venezuela")
map(regions = SA, fill=TRUE, add=TRUE)
推荐答案
rworldmap具有将数据绘制或汇总到包括大陆在内的区域级别的功能.
rworldmap has functions for plotting or aggregating data to regional levels including continents.
一个简单的开始，应该会产生下面的图:
A simple start that should produce the plot below :
library(rworldmap)
#get coarse resolution world from rworldmap
sPDF <- getMap()
#mapCountries using the 'continent' attribute
mapCountryData(sPDF, nameColumnToPlot='continent')
或者对于7大洲型号:
mapCountryData(sPDF, nameColumnToPlot='REGION')
要将您自己的数据从国家/地区汇总到区域，请查看:
To aggregate your own data from country to regional level look at :
?mapByRegion
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