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R语言安装包无法加载
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刚解决了困扰我一天半的问题，现记录下来，方便以后自己或他人遇到同样的问题时能够顺利解决。
R语言通常用的装载安装包额方式有两种
(1)install.packages("package")
(2)R网站上下载后将安装包放在R路径下的library内再调用
但我运行时两种方法都没有办法成功加载安装包，报错内容如下：
--- Please select a CRAN mirror for use in this session ---
Error in download.file(url, destfile = f, quiet = TRUE) :
cannot open URL '
https://cran.r-project.org/CRAN_mirrors.csv'
In addition: Warning message:
In download.file(url, destfile = f, quiet = TRUE) :
InternetOpenUrl failed: ''
Warning: unable to access index for repositoryhttps://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib:
Error in download.file(url, destfile = f, quiet = TRUE) :
cannot open URL '
https://cran.r-project.org/CRAN_mirrors.csv'In addition: Warning message:
In download.file(url, destfile = f, quiet = TRUE) :
InternetOpenUrl failed: ''
Warning: unable to access index for repository
https://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib: cannot open URL 'https://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES'
解决方法：R语言镜像访问貌是通过IE浏览器，所以当我偶然想到时，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，而且以前经常加载出问题的包也能顺利加载。
以上均为个人想法，希望有不对的地方大家能不吝赐教！
https://blog.sciencenet.cn/blog-1501226-952841.html
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