r - 无法在最新版本的 RStudio 和 R Version.3.1.1 中安装软件包

Question

我无法通过最新版本的 RStudio and R Version.3.1.1. 安装软件包请帮忙。我收到如下错误:

Example:
Warning in install.packages :
  InternetOpenUrl failed: ''
Warning in install.packages :
  InternetOpenUrl failed: ''
Warning in install.packages :
  unable to access index for repository http://cran.rstudio.com/bin/windows/contrib/3.1
Installing package into ‘C:/Users/Documents/R/win-library/3.1’
(as ‘lib’ is unspecified)
Warning in install.packages :
  InternetOpenUrl failed: ''
Warning in install.packages :
  InternetOpenUrl failed: ''
Warning in install.packages :
  unable to access index for repository http://cran.rstudio.com/bin/windows/contrib/3.1
Warning in install.packages :
  package ‘reshape’ is not available (for R version 3.1.1)

Answer 1

不能 100% 确定您有同样的问题，但我发现我的工作阻止了提供的每个镜像站点选项，并且我收到了如下错误:

Installing package into ‘/usr/lib64/R/library’
(as ‘lib’ is unspecified)
--- Please select a CRAN mirror for use in this session ---
Error in download.file(url, destfile = f, quiet = TRUE) : 
  unsupported URL scheme
Warning: unable to access index for repository https://rweb.crmda.ku.edu/cran/src/contrib
Warning message:
package ‘ggplot2’ is not available (for R version 3.2.2)

解决方法(我使用的是 CentOS)...

install.packages('package_name', dependencies=TRUE, repos='http://cran.rstudio.com/')

我希望这可以帮助某些人避免几个小时的挫败感。