https://github.com/ramnathv/rMaps
我尝试复制此示例，地图未显示：
library(rMaps)
crosslet(
x = "country",
y = c("web_index", "universal_access", "impact_empowerment", "freedom_openness"),
data = web_index
)
我没有能够实现这一目标的软件包吗？我安装了以下内容：
rCharts
rMaps
jsonlite