title: How to select a CRAN mirror in R
body: <p>I'm trying to install a package through the R prompt by doing the following:</p>
  
  <pre><code>install.packages('RMySQL')
  </code></pre>
  
  <p>But the output is as follows: </p>
  
  <pre><code>--- Please select a CRAN mirror for use in this session ---
  </code></pre>
  
  <p>And nothing else! I can't find a solution to this very basic problem. What am I supposed to type in order to select a CRAN mirror? </p>
  
  <p>EDIT: </p>
  
  <p>OS: Mac-OS X 10.6.8
  R Version: 2.15.0</p>