title: How can I join the points of a plot whose data contains gaps?
body: <p>I'm trying to join the points of a plot with at least 70 subplots, since it is not a scatter (because I can't use it since they are not series), I've tried marker = 'o-', but doesn't work. The data is in the format %mm-%yy, there are at least 6 different months (as a date column), and not for every column (Fund names) there exist any data in an specific month, however I want to join all the points from the same column even if they skipped any date.</p>
  <p>I'm trying this, however it only joins the data that corresponds to following months.</p>
  <pre><code>df.plot(subplots = True, figsize = (20,20), layout = (14,5),legend=False,marker='o')
  </code></pre>
  <p><img src="https://i.stack.imgur.com/RVCGX.png" alt="enter image description here" /></p>