英文:
How to show states of a country map while using rnaturalearth package?
问题
如果使用sp包，sp::plot(ne_states(country = "spain"))会显示一个西班牙地图，其中包含该国的各个州。然而，如果不使用sp包，例如：
ne_countries(scale = 10, returnclass = 'sf') %>%
filter(geounit == "Spain") %>%
ggplot() +
geom_sf() +
theme_void()
如何获得相同的结果呢？如果我执行以下代码：
ne_states(scale = 10, returnclass = 'sf') %>%
filter(geounit == "Spain") %>%
ggplot() +
geom_sf() +
theme_void()
将会抛出以下错误：
Error in ne_states(scale = 10, returnclass = "sf") :
unused argument (scale = 10)
英文:
If one uses the sp package, sp::plot(ne_states(country = "spain")) shows a Spain map in which states of the country are rendered. However, if the sp package is not used, say,
ne_countries(scale = 10, returnclass = 'sf') %>%
filter(geounit == "Spain") %>%
ggplot() +
geom_sf() +
theme_void()
how can one get the same result? If I do
ne_states(scale = 10, returnclass = 'sf') %>%
filter(geounit == "Spain") %>%
ggplot() +
geom_sf() +
theme_void()
the following error is thrown:
Error in ne_states(scale = 10, returnclass = "sf") :
unused argument (scale = 10)
答案1
得分: 1
问题在于 ne_states 没有 scale 参数。除此之外，对于 sf 和 sp，除了不同的 returnclass，基本上是一样的：
library(ggplot2)
library(rnaturalearth)
# 对于 {rnaturalearth}，将不再支持 Spatial 对象 (`sp`)，并且将在未来版本中删除该包的支持。请改用 {rnaturalearth} 中的 `sf` 对象。例如：`ne_download(returnclass = 'sf')`
ne_states(country = "Spain", returnclass = "sf") |>
ggplot() +
geom_sf() +
theme_void()
英文:
The issue is that ne_states has no scale argument. Besides that it's basically the same for sf as for sp except for the different returnclass:
library(ggplot2)
#> Warning: package 'ggplot2' was built under R version 4.2.3
library(rnaturalearth)
#> Warning: package 'rnaturalearth' was built under R version 4.2.3
#> Support for Spatial objects (`sp`) will be deprecated in {rnaturalearth} and will be removed in a future release of the package. Please use `sf` objects with {rnaturalearth}. For example: `ne_download(returnclass = 'sf')`
ne_states(country = "Spain", returnclass = "sf") |>
ggplot() +
geom_sf() +
theme_void()
<!-- -->
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论