R install packages InternetOpenUrl failed: ''_package ‘car’ is not available (for r version 3.3.-优快云博客

本文介绍了在R语言中安装“car”包时遇到的问题及解决方法。主要问题是无法访问R包仓库，表现为无法打开URL。解决策略是检查并修复IE浏览器的网络连接，确保其能正常访问互联网。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

错误：

> install.packages("car")

Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
InternetOpenUrl failed: ''
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 :
InternetOpenUrl failed: ''
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/src/contrib:
cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/src/contrib/PACKAGES'
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
InternetOpenUrl failed: ''
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 :
InternetOpenUrl failed: ''
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/src/contrib:
cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/src/contrib/PACKAGES'
Warning in install.packages :
package ‘car’ is not available (for R version 3.3.1)
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/3.3:
cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/3.3/PACKAGES'
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
InternetOpenUrl failed: ''
Warning in install.packages :
unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.3:

cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.3/PACKAGES'

正确解决方法：

R语言镜像访问貌是通过IE浏览器，所以查看IE浏览器是否可以连上网，往往问题出在IE浏览器不能连网。将IE浏览器重新修复(方法参照百度)后加载安装包就能成功运行了，顺利加载。