> install.packages("maptools",lib="E:/R包")
还安装相依关系‘sp’
试开URL’https://mirror.lzu.edu.cn/CRAN/bin/windows/contrib/4.1/sp_1.4-5.zip'
Content type 'application/zip' length 1824259 bytes (1.7 MB)
downloaded 1.7 MB
试开URL’https://mirror.lzu.edu.cn/CRAN/bin/windows/contrib/4.1/maptools_1.1-1.zip'
Content type 'application/zip' length 2169107 bytes (2.1 MB)
downloaded 2.1 MB
package ‘sp’ successfully unpacked and MD5 sums checked
package ‘maptools’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\Public\Documents\Wondershare\CreatorTemp\RtmpW4D1KQ\downloaded_packages
参考一下:https://pjbartlein.github.io/REarthSysSci/packages-and-data.html
如有帮助,望采纳,谢谢
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