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+## Copyright (C) 2012 pdiribarne
+##
+## This program 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.
+##
+## This program 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} {@var{hnew} =} copyobj (@var{horig})
+## @deftypefnx  {Function File} {@var{hnew} =} copyobj (@var{horig}, @var{hparent})
+## Constructs a copy of the object associated with handle @var{horig}
+## and returns a handle, @var{hnew}, to the new object.
+## If a parent handle @var{hparent} (root, figure, axes or hggroup) is specified,
+## the copied object will be created as a child to @var{hparent}.
+## @seealso{findobj, get, set, struct2hdl, hdl2struct}
+## @end deftypefn
+
+## Author: pdiribarne <pdiribarne@new-host.home>
+## Created: 2012-04-01
+
+function hout = copyobj (hin, hpar = 0)
+
+  partypes = {"root", "figure", "axes", "hggroup"};
+  othertypes = {"line", "patch", "surface", "image", "text"};
+  alltypes = [partypes othertypes];
+
+  if (! ishandle (hin) || nargin > 2)
+    print_usage ();
+  elseif (! ishandle (hpar))
+    hpar = figure (floor (hpar));
+  elseif (! any (strcmpi (get (hpar).type, partypes)))
+    print_usage ();
+  endif
+
+  ## compatibility of input handles
+  kididx = find (strcmp (alltypes, get (hin).type));
+  paridx = find (strcmp (alltypes, get (hpar).type));
+
+  if (kididx <= paridx)
+    error ("copyobj: %s object can't be children to %s.",
+           alltypes{kididx}, alltypes{paridx})
+  elseif nargin == 1
+    str = hdl2struct (hin);
+    hout = struct2hdl (str);
+  else
+    str = hdl2struct (hin);
+    hout = struct2hdl (str, hpar);
+  endif
+endfunction
+
+%!test
+%! h1 = figure ();
+%! set (h1, "visible", "off")
+%! x = 0:0.1:2*pi;
+%! y1 = sin (x);
+%! y2 = exp (x - 1);
+%! ax = plotyy (x,y1, x-1,y2, @plot, @semilogy);
+%! xlabel ("X");
+%! ylabel (ax(1), "Axis 1");
+%! ylabel (ax(2), "Axis 2");
+%! axes (ax(1));
+%! text (0.5, 0.5, "Left Axis", ...
+%!       "color", [0 0 1], "horizontalalignment", "center");
+%! axes (ax(2));
+%! text (4.5, 80, "Right Axis", ...
+%!       "color", [0 0.5 0], "horizontalalignment", "center");
+%! s1 = hdl2struct (h1);
+%! h2 = struct2hdl (s1);
+%! s2 = hdl2struct (h2);
+%! png1 = strcat (tmpnam (), ".png");
+%! png2 = strcat (tmpnam (), ".png");
+%! unwind_protect
+%!   print (h1, png1)
+%!   [img1, map1, alpha1] = imread (png1);
+%!   print (h2, png2)
+%!   [img2, map2, alpha2] = imread (png2);
+%! unwind_protect_cleanup
+%!   unlink (png1);
+%!   unlink (png2);
+%! end_unwind_protect
+%! assert (img1, img2)
+%! assert (map1, map2)
+%! assert (alpha1, alpha2)
+
+%!demo
+%! hdl = figure (1234);
+%! clf ()
+%! hold on
+%! x = 1:10;
+%! y = x.^2;
+%! dy = 2 * (.2 * x);
+%! y2 = (x - 3).^2;
+%! hg = errorbar (x, y, dy,'#~');
+%! set (hg, 'marker', '^', 'markerfacecolor', rand(1,3))
+%! plot (x, y2, 'ok-')
+%! legend ('errorbar', 'line')
+%! hout = copyobj (1234);
+
+%!demo
+%! hdl = figure (1234);
+%! clf ()
+%! subplot (2, 2, 1);
+%! hold on
+%! [C, H] = contourf (rand(10, 10));
+%! colorbar
+%! subplot (2, 2, 2);
+%! hold on
+%! quiver (rand(10, 10), rand(10, 10))
+%! subplot (2, 2, 3);
+%! colormap (jet (64))
+%! sombrero;
+%! colorbar('peer', gca, 'NorthOutside')
+%! subplot (2, 2, 4);
+%! imagesc (rand (30, 30));
+%! text (15, 15, 'Rotated text', ...
+%!      'HorizontAlalignment', 'Center', 'Rotation', 30);
+%! hout = copyobj (1234);
+