--- /dev/null
+## Copyright (C) 2007-2012 Michael Goffioul
+## Copyright (C) 2007-2009 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} {} area (@var{x}, @var{y})
+## @deftypefnx {Function File} {} area (@var{x}, @var{y}, @var{lvl})
+## @deftypefnx {Function File} {} area (@dots{}, @var{prop}, @var{val}, @dots{})
+## @deftypefnx {Function File} {} area (@var{y}, @dots{})
+## @deftypefnx {Function File} {} area (@var{h}, @dots{})
+## @deftypefnx {Function File} {@var{h} =} area (@dots{})
+## Area plot of cumulative sum of the columns of @var{y}. This shows the
+## contributions of a value to a sum, and is functionally similar to
+## @code{plot (@var{x}, cumsum (@var{y}, 2))}, except that the area under
+## the curve is shaded.
+##
+## If the @var{x} argument is omitted it is assumed to be given by
+## @code{1 : rows (@var{y})}. A value @var{lvl} can be defined that determines
+## where the base level of the shading under the curve should be defined.
+##
+## Additional arguments to the @code{area} function are passed to
+## @code{patch}.
+##
+## The optional return value @var{h} is a graphics handle to the hggroup
+## object representing the area patch objects.
+## @seealso{plot, patch}
+## @end deftypefn
+
+function h = area (varargin)
+
+ [ax, varargin, nargin] = __plt_get_axis_arg__ ("area", varargin{:});
+
+ if (nargin > 0)
+ idx = 1;
+ x = y = [];
+ bv = 0;
+ args = {};
+ ## Check for (X) or (X,Y) arguments and possible base value.
+ if (nargin >= idx && ismatrix (varargin{idx}))
+ y = varargin{idx};
+ idx++;
+ if (nargin >= idx)
+ if (isscalar (varargin{idx}))
+ bv = varargin{idx};
+ idx++;
+ elseif (ismatrix (varargin{idx}))
+ x = y;
+ y = varargin{idx};
+ idx++;
+ if (nargin >= idx && isscalar (varargin{idx}))
+ bv = varargin{idx};
+ idx++;
+ endif
+ endif
+ endif
+ else
+ print_usage ();
+ endif
+ ## Check for additional args.
+ if (nargin >= idx)
+ args = {varargin{idx:end}};
+ endif
+ newplot ();
+ if (isvector (y))
+ y = y(:);
+ endif
+ if (isempty (x))
+ x = repmat ([1:size(y, 1)]', 1, size (y, 2));
+ elseif (isvector (x))
+ x = repmat (x(:), 1, size (y, 2));
+ endif
+
+ oldax = gca ();
+ unwind_protect
+ axes (ax);
+ tmp = __area__ (ax, x, y, bv, args{:});
+ unwind_protect_cleanup
+ axes (oldax);
+ end_unwind_protect
+
+ if (nargout > 0)
+ h = tmp;
+ endif
+ else
+ print_usage ();
+ endif
+
+endfunction
+
+function retval = __area__ (ax, x, y, bv, varargin)
+
+ y0 = bv * ones (1, rows (y));
+ y0 = zeros (1, rows (y));
+ retval = [];
+ for i = 1: size (y, 2);
+ hg = hggroup ();
+ retval = [retval; hg];
+ args = __add_datasource__ ("area", hg, {"x", "y"}, varargin{:});
+
+ x1 = x(:, 1).';
+ y1 = y (:, i).';
+ addproperty ("xdata", hg, "data", x1);
+ addproperty ("ydata", hg, "data", y1);
+
+ addlistener (hg, "xdata", @update_data);
+ addlistener (hg, "ydata", @update_data);
+
+ if (i == 1)
+ h = patch (ax, [x1(1), x1, fliplr(x1)], [bv, y1, bv*ones(1, length(y1))],
+ __next_line_color__ (), "parent", hg);
+ else
+ y1 = y0 + y1;
+ h = patch (ax, [x1(1), x1, fliplr(x1)], [y0(1), y1, fliplr(y0)],
+ __next_line_color__ (), "parent", hg);
+ endif
+
+ y0 = y1;
+
+ addproperty ("basevalue", hg, "data", bv);
+ addlistener (hg, "basevalue", @move_baseline);
+
+ addproperty ("edgecolor", hg, "patchedgecolor", get (h, "edgecolor"));
+ addproperty ("linewidth", hg, "patchlinewidth", get (h, "linewidth"));
+ addproperty ("linestyle", hg, "patchlinestyle", get (h, "linestyle"));
+ addproperty ("facecolor", hg, "patchfacecolor", get (h, "facecolor"));
+
+ addlistener (hg, "edgecolor", @update_props);
+ addlistener (hg, "linewidth", @update_props);
+ addlistener (hg, "linestyle", @update_props);
+ addlistener (hg, "facecolor", @update_props);
+
+ addproperty ("areagroup", hg, "data");
+ set (retval, "areagroup", retval);
+
+ if (! isempty (args))
+ set (hg, args{:});
+ endif
+ endfor
+
+endfunction
+
+function update_props (h, d)
+ kids = get (h, "children");
+ set (kids, "edgecolor", get (h, "edgecolor"),
+ "linewidth", get (h, "linewidth"),
+ "linestyle", get (h, "linestyle"),
+ "facecolor", get (h, "facecolor"));
+endfunction
+
+function move_baseline (h, d)
+ persistent recursion = false;
+
+ ## Don't allow recursion
+ if (! recursion)
+ unwind_protect
+ recursion = true;
+ hlist = get (h, "areagroup");
+ b0 = get (h, "basevalue");
+
+ for hh = hlist(:)'
+ if (hh != h)
+ b1 = get (hh, "basevalue");
+ if (b1 != b0)
+ set (hh, "basevalue", b0);
+ endif
+ endif
+ endfor
+ update_data (h, d);
+ unwind_protect_cleanup
+ recursion = false;
+ end_unwind_protect
+ endif
+endfunction
+
+function update_data (h, d)
+ hlist = get (h, "areagroup");
+ bv = get (h, "basevalue");
+ for i = 1 : length (hlist)
+ hh = hlist(i);
+ x1 = get (hh, "xdata")(:);
+ y1 = get (hh, "ydata")(:);
+
+ set (get (hh, "children"), "xdata", [x1(1); x1; flipud(x1)]);
+ if (i == 1)
+ set (get (hh, "children"), "ydata", [bv; y1; bv*ones(length(y1), 1)]);
+ else
+ y1 = y0 + y1;
+ set (get (hh, "children"), "ydata", [y0(1); y1; flipud(y0)]);
+ endif
+
+ y0 = y1;
+ endfor
+endfunction
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff