r - R中的美国标签值映射

Question

我正在使用数据结果（[ https://drive.google.com/file/d/0B0zK9xcdOi1sQ1JaZFZYX1FQaUU/view?usp=sharing]）

我要做的是使用 maps 包根据该州的标签值为美国地图的州着色。

我正在尝试使用以下代码，但它不起作用。

library(choroplethr)

gtd <- read.csv("/Users/urAD_Jeff/Documents/Image analysis/result PNG/state.CSV")

statelabel<- ddply(gtd, .(y), "nrow")

colnames(statelabel) <- c("label", "value")

statelabel$label <- tolower(statelabel$label)
statelabel$label <- gsub(" (u.s. state)", "", statelabel$label, fixed=TRUE)

choroplethr(statlabel, lod="state")

想要的结果图像如下所示：

Answer 1

这是最接近的（您缺少状态）：

library(choroplethr)
library(choroplethrMaps)
library(plyr)

gtd <- read.csv("State.CSV")

statelabel <- gtd[,2:3]
colnames(statelabel) <- c("region", "value")

statelabel$region <- tolower(statelabel$region)
statelabel$region <- gsub(" (u.s. state)", "", statelabel$region, fixed=TRUE)

state_choropleth(statelabel)
# Warning in super$initialize(map.df, user.df) :
#   Your data.frame contains the following regions which are not mappable:
#   washington (state), unknown
# Warning in self$bind() :
#   The following regions were missing and are being set to NA: north dakota, 
#   rhode island, south dakota, district of columbia