使用 leaflet function add_heatmap() 或 addHeatmap() 在 R 上创建热图

Question

I am trying to create a plot with heatmap using plotly add_heatmap() function, but it generates an error message saying Error: Must supply z attribute I referred to this site for addHeatmap() function provided by leaflet.extras package.

以下代码仅显示 addCircles() 中的点并输出警告消息和 map，如下所示：

final_df %>%
  leaflet() %>%
  addTiles() %>%
  addCircles(
    lng = final_df$long,
    lat = final_df$lat,
    popup = final_df$station_name
  ) %>% addHeatmap(lng = final_df$long, lat = final_df$lat, radius=5)

我尝试了来自 leaflet 的不同 function add_heatmap() ，它不显示任何地图并生成错误。

final_df %>%
  leaflet() %>%
  addTiles() %>%
  addCircles(
    lng = final_df$long,
    lat = final_df$lat,
    popup = final_df$station_name
  ) %>% add_heatmap(lng = final_df$long, lat = final_df$lat)

有人遇到过类似问题并在 R 上创建了热图吗？

Answer 1

删除 addCircles 部分并尝试：

library(leaflet.extras)

final_df %>%
  leaflet() %>%
  addTiles() %>%
  addHeatmap(lng = final_df$long, lat = final_df$lat, blur = 40, max = 0.05, radius = 15)