title: Adding a marker on a seaborn lineplot for each observation
body: <p>I have a simple dataframe that I want to plot with a seaborn/matplotlib:</p>
  <pre><code>     STA#  RUN# BIB#            COURSE INTER 1  FINISH       DAG
  64     22     1   12  STRAIGHT-GLIDING   19,01   19.37  TRENING1
  72    148     8   12          COURSE 2   19,08   19.44  TRENING1
  74    204    11   12          COURSE 2   19,10   19.47  TRENING1
  76    253    14   12          COURSE 2   19,13   19.49  TRENING1
  79    186    10   12          COURSE 2   19,13   19.50  TRENING1
  294   277    13   12          COURSE 1   18,33   18.68  TRENING2
  297   283    14   12          COURSE 1   18,35   18.70  TRENING2
  299   165     7   12          COURSE 1   18,37   18.71  TRENING2
  300   243    11   12          COURSE 1   18,38   18.73  TRENING2
  304   262    12   12          COURSE 1   18,42   18.76  TRENING2
  308   102     4   12          COURSE 1   18,44   18.78  TRENING2
  
  
  </code></pre>
  <p>I am managed to create a lineplot using the following code with seaborn:</p>
  <pre><code>g = sns.FacetGrid(df, hue=&quot;COURSE&quot;, col=&quot;DAG&quot;, palette=&quot;Set2&quot;)
  g = g.map(sns.lineplot, &quot;RUN#&quot;, &quot;FINISH&quot;)
  g.add_legend()
  </code></pre>
  <p>It looks okay but I want a dot for each observation that I have in addition to the line. Any ideas of how I can accomplish this task?</p>