title: How can I set plot.ly bin for histogram to minutes?
body: <p>I have a basic histogram chart and need to set xbin to minutes. The examples only show the categorical coordinate strings for months (eg. M1). How do I set it for minutes? Is there a reference to all possibilities? I don't see it on the plot.ly reference page.</p>
  
  <p>Here is a sample pin.io of a histogram: <a href="https://codepen.io/nws-jholmberg/pen/oPKOMj" rel="nofollow noreferrer">https://codepen.io/nws-jholmberg/pen/oPKOMj</a></p>
  
  <p>I'm specifically looking to set the "size" value in this section:</p>
  
  <pre><code>  xbins: {
      end: '2016-12-31 12:00', 
      size: 'M1', 
      start: '1983-12-31 12:00'
    }
  </code></pre>