阿拉斯加和夏威夷没有正确格式化R的County Choropleth Map

Question

我正在尝试将美国的Choropleth地图格式化为特定的颜色，不幸的是，当使用scale_fill_brewer来改变颜色时;只有48个州（夏威夷和阿拉斯加州没有）。是否有可能知道我是否可以为夏威夷和阿拉斯加实施着色？

library(choroplethr) 
library(choroplethrMaps)
library(ggplot2) 
data(df_pop_county)

county_choropleth(df_pop_county, title = "Title1", legend = "Top 20% of Index", num_colors = 9) + 

geom_polygon(aes(fill=value), color="white")  + 

scale_fill_brewer(name="Top Index", palette="YlOrRd")

Answer 1

要使用此选项并正确更新所有状态，我们可以work with it as an R6 object，如下所示：

library(choroplethr) 
library(choroplethrMaps)
library(ggplot2) 
data(df_pop_county)

choro              = CountyChoropleth$new(df_pop_county)
choro$title        = "2012 Population Estimates"
choro$ggplot_scale = scale_fill_brewer(name="Population", palette=2, drop=FALSE)
choro$render()

使用您提到的特定托盘：

choro              = CountyChoropleth$new(df_pop_county)
choro$title        = "2012 Population Estimates"
choro$ggplot_scale = scale_fill_brewer(name="Population", palette="YlOrRd", drop=FALSE)
choro$render()