将shapefile多边形添加到Choroplethr图中

Question

我想添加一个包含多边形的shapefile到我的Choroplethr包创建的Choroplethr地图。创建了choropleth地图，代码如下：

choro=county_choropleth(Change, title= "WeeklyChange", state_zoom = continental_us,reference_map = F)+ scale_fill_manual(values=c("-3"="red4","-2"="red3","-1"="red1", "0"="snow","1"="greenyellow","2"="green","3"="green3"))

plot(choro)

gold= readShapePoly("Gold") gold_df= fortify(gold) land= ggplot(data= gold_df,aes(x=long, y= lat, group=group))+ geom_polygon(colour="gold3")

plot(gold)

这两个物体看起来都是正确的，但是我不能把黄金图样堆放在合奏图上。合唱图和黄金图

提前感谢！

Answer 1

感谢阿里·兰斯坦帮助我。下面是添加多边形的代码

# Create Choropleth Map
`choro=county_choropleth(Change, title= "WeeklyChange",
state_zoom = continental_us,reference_map = F)+
scale_fill_manual(values=c("-3"="red4","-2"="red3","-1"="red1",
"0"="snow","1"="greenyellow","2"="green","3"="green3"))`

`#Import shapefile polygons
gold= readShapePoly("Gold")`

`#Create dataframe for ggplot
gold_df= fortify(gold)`

`#Combine Choropleth Map and shapefile dataframe
choro+geom_polygon(data= gold_df,aes(x=long, y= lat,group=group),fill="gold3")`