Draw filled 2-D polygons.

  FILL(X,Y,C) fills the 2-D polygon defined by vectors X and Y

  with the color specified by C.  The vertices of the polygon

  are specified by pairs of components of X and Y.  If necessary,

  the polygon is closed by connecting the last vertex to the first.



  If C is a single character string chosen from the list 'r','g','b',

  'c','m','y','w','k', or an RGB row vector triple, [r g b], the

  polygon is filled with the constant specified color.



  If C is a vector the same length as X and Y, its elements are

  scaled by CAXIS13534KK and used as indices into the current COLORMAPBOEE9I to

  specify colors at the vertices; the color within the polygon is

  obtained by bilinear interpolation in the vertex colors.



  If X and Y are matrices the same size, one polygon per column

  is drawn. In this case, C is a row vector for "flat" polygon

  colors, and C is a matrix for "interpolated" polygon colors. 



  If either of X or Y is a matrix, and the other is a column vector

  with the same number of rows, the column vector argument is

  replicated to produce a matrix of the required size.



  FILL(X1,Y1,C1,X2,Y2,C2,...) is another way of specifying

  multiple filled areas.



  FILL sets the PATCH1T5W1TX object FaceColor property to 'flat', 'interp',

  or a colorspec depending upon the value of the C matrix.



  FILL returns a column vector of handles to PATCH1T5W1TX objects, one handle

  per patch. The X,Y,C triples can be followed by parameter/value pairs 

  to specify additional properties of the patches. FILL does not respond 

  to the NextPlot axis property.