异常:

> install.packages("rms")
--- Please select a CRAN mirror for use in this session ---
Warning: failed to download mirrors file (cannot open URL 'https://cran.r-project.org/CRAN_mirrors.csv'); using local file '/Bioinfo/Pipeline/SoftWare/R/R-3.6.1/lib64/R/doc/CRAN_mirrors.csv'
trying URL 'http://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/rms_6.0-0.tar.gz'
Content type 'application/x-gzip' length 623859 bytes (609 KB)
==================================================
downloaded 609 KB
......
* DONE (rms)

The downloaded source packages are in
/tmp/RtmpJF5nYY/downloaded_packagesUpdating HTML index of packages in '.Library'
Making 'packages.html' ... done
Warning message:
In download.file(url, destfile = f, quiet = TRUE) :
  URL 'https://cran.r-project.org/CRAN_mirrors.csv': status was 'SSL connect error'
> 

参考方法:


# CRAN 镜像源配置文件之一是 .Rprofile (linux 下位于 ~/.Rprofile ),可以在文末添加如下语句:
options("repos" = c(CRAN="https://mirrors.tuna.tsinghua.edu.cn/CRAN/"))



参考资料


  1. Tuna,CRAN 镜像使用帮助清华大学开源软件镜像站
  2. rstudio,Secure Package Downloads for RRStudio Suppor