title: Saving a correlation matrix graphic as PDF
body: <p>I have an correlation matrix object I created with corrplot</p>
  
  <pre><code>p1 &lt;- corrplot(correlations_history, method = "number", type = "lower", title = "Regional Factor Correlation Matrix over history", mar = c(0,0,1,0), number.cex = 0.5, number.digits = 2)
  </code></pre>
  
  <p>I'm trying to save it as a pdf.  For some reason I can't figure out how to do that.  Any help appreciated.  Thank you!</p>