title: Installing xlsx package in R
body: <p>I am trying to install xlsx via CRAN for R.</p>
  
  <pre><code>install.packages("xslx")
  
  # Warning message:
  # package 'xlsx' is not available (for R version 3.1.2)
  </code></pre>
  
  <p>Does this mean I need to get an older version of R?</p>
  
  <p>OS X Yosemite 10.10
  R 3.1.2 GUI 1.65 Mavericks build</p>
  
  <p>Thanks!</p>