title: Plot certain columns based on their name
body: <p>I have a dataframe with multiple columns which looks like this.</p>
  <pre><code>date               A       B        C        D         E
  1996-01-02  1.000000 1.00000  1.00000  1.00000   1.00000
  1996-01-03  0.000950 0.00020  0.99975  1.00000   1.00007
  1996-01-04 -0.005826 0.00020  1.00006  1.00046   1.00068
  1996-01-05 -0.001587 0.00019  0.99962  0.99917   0.99853
  1996-01-08  0.002821 0.00020  0.99878  0.99695   0.99493
  1996-01-09 -0.014568 0.00020  0.99935  0.99801   0.99649
  </code></pre>
  <p>And I just want to plot certain columns, where the column names match up with the first x rownames of another df, which looks like this:</p>
  <pre><code>Row Name     Value
  B        0.2455867
  C        0.2117051
  Z        0.2043087
  M        0.1997719
  A        0.1706845
  </code></pre>
  <p>For example, that I am able to choose that i just plot the first two, which gives me Columns B and C in a combined graph since the first two row names in the second df are B and C.</p>