我正在尝试使用 library() 以标准方式安装库 plotKML 和 spatialEco。
然而，尽管我更新了 R，更新了我的所有库，并尝试重新安装它们，但我不断收到下一个错误：
> library(plotKML)
plotKML version 0.6-1 (2020-03-08)
Error: package or namespace load failed for ‘plotKML’:
.onAttach failed in attachNamespace() for 'plotKML', details:
call: CRS("+init=epsg:4326")
error: NA
In addition: Warning message:
package ‘plotKML’ was built under R version 4.0.3
> library(spatialEco)
Error: package or namespace load failed for ‘spatialEco’:
.onLoad failed in loadNamespace() for 'units', details:
call: udunits_init(file.path(.get_ud_xml_dir(), "udunits2.xml"))
error: Error in function udunits_init: Can't open installed, default, unit database
In addition: Warning message:
package ‘spatialEco’ was built under R version 4.0.3
我该如何解决？