Adds an ellipse to the current plot. INPUTS crow - the row location of the center of the ellipse ccol - the column location of the center of the ellipse ra - semi-major axis radius length (in pixels) of the ellipse rb - semi-minor axis radius length (in pixels) of the ellipse phi - rotation angle (in radians) of the semimajor axis from the x-axis color - [optional] color for ellipse npoints - [optional] number of points used to draw each ellipse OUTPUT h - handle to ellipse DATESTAMP 29-Sep-2005 2:00pm EXAMPLE plot_ellipse( 3, 2, 1, 5, pi/6, 'g')