title: Obtaining tickmark vector or intervals in R - par("yaxp") not working
body: <p>I have a log-log plot displaying tick marks on the y-axis from 1 to 7. I would like to obtain the interval between each tickmark for a function. </p>
  
  <pre><code>&gt; par("yaxp")
  [1]  1  7 -6
  </code></pre>
  
  <p>I was expecting par("yaxp")[3] to be 1. </p>
  
  <p>Why is it -6? How can I get R to return the interval between tickmarks?</p>