title: Octave / Matlab: How to plot the roots of a polynomial
body: <p>Im trying to plot the roots of a polynomial, and i just cant get it.</p>
  
  <p>First i create my polynomial</p>
  
  <pre><code>p5 = [1 0 0 0 0 -1] %x^5 - 1
  r5 = roots(p5)
  stem (p5)
  </code></pre>
  
  <p>Im using the <code>stem</code> function, but I would like to remove the stems, and just get the circle around the roots.</p>
  
  <p>Is this possible, is stem the right command?</p>
  
  <p>Thanks in advance,</p>
  
  <p>PS: This is not homework, but very close, will tag it if requested.</p>