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+
+## Copyright (C) 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2002, 2004,
+##               2005, 2006, 2007 John W. Eaton
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} pcolor (@var{x}, @var{y}, @var{c})
+## @deftypefnx {Function File} {} pcolor (@var{c})
+## Density plot for given matrices @var{x}, and @var{y} from @code{meshgrid} and
+## a matrix @var{c} corresponding to the @var{x} and @var{y} coordinates of
+## the mesh.  If @var{x} and @var{y} are vectors, then a typical vertex
+## is (@var{x}(j), @var{y}(i), @var{c}(i,j)).  Thus, columns of @var{c}
+## correspond to different @var{x} values and rows of @var{c} correspond
+## to different @var{y} values.
+## @seealso{meshgrid, contour}
+## @end deftypefn
+
+## Author: jwe
+
+function h = pcolor (x,y,c)
+
+  newplot ();
+
+  if (nargin == 1)
+    C = x;
+    Z = zeros(size(C));
+    [nr, nc] = size(C);
+    [X, Y] = meshgrid(1:nr, 1:nc);
+  elseif (nargin == 3)
+    Z = zeros(size(C));
+  else
+    print_usage();
+  end;
+
+
+  tmp = surface (X,Y,Z,C);
+  ax = get(tmp, "parent");
+  set (tmp, "FaceColor", "flat");
+  set (ax, "view", [0, 90]);
+  if (nargout > 0)
+    h = tmp;
+  endif
+
+endfunction