title: R How to Read Pair plot
body: <pre><code>library(astsa)
  data(cmort)
  data(tempr)
  data(part)
  pairs(cbind(Mortality=cmort, Temperature=tempr, Particulates=part))
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/4vOn7.png" alt="enter image description here"></p>
  
  <p>The author mentioned in his <a href="http://www.stat.pitt.edu/stoffer/tsa3/tsa3EZ.pdf" rel="nofollow noreferrer">book</a> - Page 46 that "Note the curvilinear shape of the temperature mortality curve, indicating that higher temperatures as well as lower temperatures
  are associated with increases in cardiovascular mortality." </p>
  
  <p>Am I reading the scatterplot incorrectly or what.. I just cannot make sense of what the author said... </p>