title: Multi line time series pandas
body: <p>I am trying to plot a multi line graph from pandas in python. I need three lines (positive, negative, neutral) and their number of occurrences during time. On the x-axis I would have the time, on the y- axis I would have the number of occurrences and I would have three lines in one graph. If there is no occurrence then it would be automatically zero (for example in th etable there is no occurrence for &quot;negative&quot; so in the graph the point would be zero). I am attaching the table that I would need to turn into graph.</p>
  <pre><code>d = datapandas.groupby([&quot;date&quot;,&quot;classification&quot;]).size()
  </code></pre>
  <p><a href="https://i.stack.imgur.com/JZm5l.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JZm5l.png" alt="enter image description here" /></a></p>
  <p>The most left column is the number of occurrence of the classification during the date. I could not find any easy way to plot this kind of graph.</p>