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+## Copyright (C) 2007-2012 David Bateman
+##
+## 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} {} pie (@var{x})
+## @deftypefnx {Function File} {} pie (@var{x}, @var{explode})
+## @deftypefnx {Function File} {} pie (@dots{}, @var{labels})
+## @deftypefnx {Function File} {} pie (@var{h}, @dots{});
+## @deftypefnx {Function File} {@var{h} =} pie (@dots{});
+## Produce a 2-D pie chart.
+##
+## Called with a single vector argument, produces a pie chart of the
+## elements in @var{x}, with the size of the slice determined by percentage
+## size of the values of @var{x}.
+##
+## The variable @var{explode} is a vector of the same length as @var{x} that
+## if non zero 'explodes' the slice from the pie chart.
+##
+## If given @var{labels} is a cell array of strings of the same length as
+## @var{x}, giving the labels of each of the slices of the pie chart.
+##
+## The optional return value @var{h} is a list of handles to the patch
+## and text objects generating the plot.
+##
+## @seealso{pie3, bar, stem}
+## @end deftypefn
+
+## Very roughly based on pie.m from octave-forge whose author was
+## Daniel Heiserer <Daniel.heiserer@physik.tu-muenchen.de>
+
+function retval = pie (varargin)
+
+  [h, varargin] = __plt_get_axis_arg__ ("pie", varargin{:});
+
+  if (nargin < 1)
+    print_usage ();
+  else
+    oldh = gca ();
+    unwind_protect
+      axes (h);
+      newplot ();
+      tmp = __pie__ ("pie", h, varargin{:});
+    unwind_protect_cleanup
+      axes (oldh);
+    end_unwind_protect
+  endif
+
+  if (nargout > 0)
+    retval = tmp;
+  endif
+
+endfunction
+
+
+%!demo
+%! clf
+%! pie ([3, 2, 1], [0, 0, 1]);
+%! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
+
+%!demo
+%! clf
+%! pie ([3, 2, 1], [0, 0, 1], {"Cheddar", "Swiss", "Camembert"});
+%! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
+%! axis ([-2,2,-2,2]);
+
+%!demo
+%! clf
+%! pie ([0.17, 0.34, 0.41], {"Cheddar", "Swiss", "Camembert"});
+%! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
+%! axis ([-2,2,-2,2]);
+%! title ("missing slice");
+