无法安装RStudio和R Version.3.1.1最新版本中的软件包

Question

我无法通过最新版本的RStudio and R Version.3.1.1.Kindly帮助安装软件包。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)