title: RStudio package Installation
body: <p>I had posted a few days earlier about issues in installing packages in RStudio here - <a href="https://stackoverflow.com/questions/27924238/rstudio-package-installation-error">RStudio Package installation error</a>. However, my question was marked as duplicate, assuming that the solution posted in the comments is actually the best solution. </p>
  
  <p>Although I have the exact same problem as already mentioned, that solution posted by Ian doesn't help. In fact I get a new kind of error. Please see below:</p>
  
  <pre><code>Warning in install.packages :
    unable to connect to 'cran.rstudio.com' on port 80.
  Warning in install.packages :
    unable to connect to 'cran.rstudio.com' on port 80.
  Warning in install.packages :
  unable to access index for repository http://cran.rstudio.com/bin/windows/contrib/3.1
  Warning in install.packages :
  unable to connect to 'www.stats.ox.ac.uk' on port 80.
  Warning in install.packages :
  unable to connect to 'www.stats.ox.ac.uk' on port 80.
  Warning in install.packages :
  unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.1
  Installing package into ‘C:/Users/avi/Documents/R/win-library/3.1’
  (as ‘lib’ is unspecified)
  </code></pre>