> install.packages("dplyr")
Warning in install.packages :
unable to access index for repository
https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
Installing package into ‘C:/Users/DELL/Documents/R/win-library/3.5’
(as ‘lib’ is unspecified)
Warning in install.packages :
unable to access index for repository
https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
Warning in install.packages :
package ‘dplyr’ is not available (for R version 3.5.1)
Warning in install.packages :
unable to access index for repository
https://cran.rstudio.com/bin/windows/contrib/3.5:
cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/3.5/PACKAGES'
My windows system is the Chinese version, but I installed Rstudio on the official website, maybe Rstudio is converted into Chinese version by default? I can't install any packages, it kept warning like that, and I reinstalled it like three times...Can someone help me? Really appreciate it.