看看 R邮政编码包；该网站包含一些示例.该程序包具有所有邮政编码的地理坐标，因此在地图上显示它们会很简单.

Take a look at the R zipcode package; the website contains some examples. The package features geographical coordinates of all zipcodes, so it will be trivial to show them on a map.

这里是正确方向的另一个指针:安装软件包"maps"和"zipcode".将它们都加载到您的环境中:

Here is another pointer into the right direction: install the package "maps" and "zipcode". Load both of them into your environment:

library( zipcode ) ; library( maps )

现在绘制美国地图:

map( "usa" )

加载邮政编码数据

data( "zipcode" )

说，您有一些邮政编码，例如90001、46243、32920，并希望在地图上显示它们.

Say, you have some zipcodes, for example 90001, 46243, 32920 and you want to show them on the map.

selected <- zipcode[ zipcode$zip %in% c( "90001", "46243", "32920" ), ]

所选数据框包含有关邮政编码的信息.绘制它们.

The selected data frame contain information about the zipcodes. Plot them.

points( selected$longitude, selected$latitude, pch= 19, cex= 2 )
text( selected$longitude, selected$latitude, selected$zip, pos=3, cex= 2 )

这是结果: