方法一
options(repos=structure(c(CRAN="https://mirrors.tuna.tsinghua.edu.cn/CRAN/")))
install.packages("包名")
方法二
install.packages
(
"ABC"
,repos=
"http://mirror.bjtu.edu.cn/ "
)
## 换成北大镜像
在RStudio中修改
Tools --> Global Options --> Packages --> Changes

国内其他镜像
China
https://mirrors.tuna.tsinghua.edu.cn/CRAN/ TUNA Team, Tsinghua University
http://mirrors.tuna.tsinghua.edu.cn/CRAN/ TUNA Team, Tsinghua University
https://mirrors.ustc.edu.cn/CRAN/ University of Science and Technology of China
http://mirrors.ustc.edu.cn/CRAN/ University of Science and Technology of China
https://mirror-hk.koddos.net/CRAN/ KoDDoS in Hong Kong
https://mirrors.eliteu.cn/CRAN/ Elite Education
https://mirror.lzu.edu.cn/CRAN/ Lanzhou University Open Source Society
http://mirror.lzu.edu.cn/CRAN/ Lanzhou University Open Source Society
https://mirrors.tongji.edu.cn/CRAN/ Tongji University
https://mirrors.shu.edu.cn/CRAN/ Shanghai University
China
https://mirrors.tuna.tsinghua.edu.cn/CRAN/ TUNA Team, Tsinghua University
http://mirrors.tuna.tsinghua.edu.cn/CRAN/ TUNA Team, Tsinghua University
https://mirrors.ustc.edu.cn/CRAN/ University of Science and Technology of China
http://mirrors.ustc.edu.cn/CRAN/ University of Science and Technology of China
https://mirror-hk.koddos.net/CRAN/ KoDDoS in Hong Kong
https://mirrors.eliteu.cn/CRAN/ Elite Education
https://mirror.lzu.edu.cn/CRAN/ Lanzhou University Open Source Society
http://mirror.lzu.edu.cn/CRAN/ Lanzhou University Open Source Society
https://mirrors.tongji.edu.cn/CRAN/ Tongji University
https://mirrors.shu.edu.cn/CRAN/ Shanghai University
查找镜像地址