title: Blocked from accessing more memory in R despite having available memory in my system
body: <p>I am trying to access more memory using code I found in stackoverflow (<a href="https://stackoverflow.com/questions/1395229/increasing-the-memory-available-to-r-processes">Increasing (or decreasing) the memory available to R processes</a>).  However, I get the following error which I haven't been able to resolve:</p>
  
  <pre><code>memory.limit(10000)
  
  Error in memory.limit(10000) : 
  don't be silly!: your machine has a 4Gb address limit
  </code></pre>
  
  <p>R is telling me that I have a 4gb address limit (despite the fact that I'm on a 64bit OS with 16gb of RAM).  Anyone know how to get around this?</p>
  
  <p>Windows OS: Windows 7 Enterprise, Intel(R) Core(TM) i7-2600 CPY @3.40GHz</p>
  
  <p>Installed Memory (RAM): 16.0GB</p>
  
  <p>System type: 64 bit OS</p>
  
  <p>R Version: 3.0.0 
  RStudio Version: 0.97.551</p>