anFentertank Warning: unable to access index for repository https://mirrors.eliteu.cn/CRAN/src/contrib: cannot open URL 'https://mirrors.eliteu.cn/CRAN/src/contrib/PACKAGES' Warning: unable to access index for repository https://mirrors.eliteu.cn/CRAN/src/contrib: cannot open URL 'https://mirrors.eliteu.cn/CRAN/src/contrib/PACKAGES' install.packages("devtools") Warning in install.packages : unable to access index for repository https://mirrors.eliteu.cn/CRAN/src/contrib: cannot open URL 'https://mirrors.eliteu.cn/CRAN/src/contrib/PACKAGES' WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding: https://cran.rstudio.com/bin/windows/Rtools/ Warning in install.packages : unable to access index for repository https://mirrors.eliteu.cn/CRAN/src/contrib: cannot open URL 'https://mirrors.eliteu.cn/CRAN/src/contrib/PACKAGES' Warning in install.packages : package ‘devtools’ is not available (for R version 3.6.1)
tctcab anFentertank 那个包的镜像可能跪了,换一个镜像即可 install.packages('devtools', repos='http://cran.us.r-project.org') 镜像列表: https://cran.r-project.org/mirrors.html