title: Split string into list of floats
body: <p>I have a string that looks like this :</p>
  
  <pre><code>'-300.0,120.0; -186.0,120.0; -106.0,80.0; -78.0,55.0; -57.0,40.0; -29.0,15.0; -10.0,15.0; 10.0,-11.0; 19.0,-11.0; 28.0,-12.0; 57.0,-27.5; 78.0,-37.0; 106.0,-50.0; 150.0,-70.0; 186.0,-90.0; 236.0,-110.0; 300.0,-120.0'
  </code></pre>
  
  <p>I want to do a scatter plot, having on the X axis numbers before the column and on the Y axis numbers after the column. Each pair is separated by ';'.</p>
  
  <p>I have numerous strings like this in a list, so I cannot use a <code>read_csv</code> or function like this.</p>
  
  <p>Is there a way to format this into a list of tuple ? Or 2 lists ?</p>
  
  <p>Thanks</p>