title: change scatter plot marker thickness
body: <p>How can you change the thickness of marker lines in a scatter plot <code>plt.scatter()</code>? <code>markeredgewidth</code> is a valid attribute in <code>plt.plot()</code>; is there any equivalent attribute for <code>scatter</code> plots?</p>
  
  <p>For example, when you change the size of a scatter plot (with <code>marker = 'x'</code>), the markers only get bigger, but the line thickness doesn't change.</p>
  
  <p>I'm not trying to change the size but line thickness!</p>