title: What are all the positions for geom_bar() and geom_col()?
body: <p>I've looked in an infinity of places, but none of them actually put all the <code>position</code>s available for these two <code>geom</code>s. I know there are <code>stack</code> (to put one on top of the other), <code>dodge</code> (to make little clusters with each group side-by-side), <code>identity</code> (to leave them one in front of the other), and <code>fill</code> (to make them fill the <code>y</code>-axis, acting as a part of a whole). But are there any others?</p>
  <p>I was wondering if there were a place were all the available <code>positions</code> are, or at least, if anyone knows of other options.</p>
  <p>This is an example of <code>position</code>:</p>
  <pre><code>[...]
  geom_bar(position = &quot;stack&quot;)
  [...]
  </code></pre>
  <p>or with <code>geom_col()</code> (works either way).</p>