adius length (in pixels) of the ellipse
  phi     - rotation angle (radians) of semimajor axis from x-axis
  color   - ['b'] color for ellipse
  nPnts   - [100] number of points used to draw each ellipse
  lw      - [1] line width
  ls      - ['-'] line style

 OUTPUT
  h       - handle to ellipse
  hc      - handle to ellipse center
  hl      - handle to ellipse orient

 EXAMPLE
  plotEllipse( 3, 2, 1, 5, pi/6, 'g');

 See also <a href="plotGaussEllipses.html" class="code" title="function hs = plotGaussEll