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Question

从这里获得代码：

Map Australian cities - R spatial

但是当我运行它时，它会显示如下图：

library(maps)
df <- world.cities[world.cities$country.etc == "Australia",]

library(leaflet)

## define a palette for hte colour
pal <- colorNumeric(palette = "YlOrRd",
                    domain = df$pop)



library(leaflet)

## define a palette for hte colour
pal <- colorNumeric(palette = "YlOrRd",
                    domain = df$pop)

leaflet(data = df) %>%
    addTiles() %>%
    addCircleMarkers(lat = ~lat, lng = ~long, popup = ~name, 
                     color = ~pal(pop), stroke = FALSE, fillOpacity = 0.6) %>%
    addLegend(position = "bottomleft", pal = pal, values = ~pop)

我在这里想念什么？