tmap_save中的错误：找不到对象"tm"

Question

当我尝试将我的绘图另存为 HTML 文件时，出现此错误：

Error in `+.tmap`(e1 = tm, e2 = do.call("tm_layout", args)) : object 'tm' not found

这是我的代码：

tm_shape(countries_spdf) +
tm_grid(n.x = 11, n.y = 11) +
tm_fill(col = "population", style = "quantile")  +
tm_borders(col = "burlywood4")
# Save a static version "population.png" [success]
tmap_save(filename = "population.png")
# Save an interactive version "population.html" [fail]
tmap_save(filename = "population.html")

我该怎么办？

Answer 1

尝试两件事：

1. 在不调用tmap_save(文件名 = "population.png"(的情况下运行所有内容。

2. 将映射分配给对象。

   Map <- tm_shape(countries_spdf) +
   tm_grid(n.x = 11, n.y = 11) +
   tm_fill(col = "population", style = "quantile")  +
   tm_borders(col = "burlywood4")
   tmap_save(tm = Map, filename = "population.html")