install.packages("usethis")
试开URL’https://cran.rstudio.com/bin/windows/contrib/4.0/usethis_1.6.1.zip'
Content type 'application/zip' length 603207 bytes (589 KB)
downloaded 589 KB
package ‘usethis’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\ThinkPad\AppData\Local\Temp\RtmpEdIv6A\downloaded_packages
install.packages("devtools")
试开URL’https://cran.rstudio.com/bin/windows/contrib/4.0/devtools_2.3.1.zip'
Content type 'application/zip' length 340894 bytes (332 KB)
downloaded 332 KB
package ‘devtools’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\ThinkPad\AppData\Local\Temp\RtmpEdIv6A\downloaded_packages
library(devtools)
载入需要的程辑包:usethis