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maint: update copyright notices for 2012
author John W. Eaton <jwe@octave.org>
date Mon, 02 Jan 2012 14:25:41 -0500
parents 5f0bb45e615c
children 5d3a684236b0
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14138
72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 Michael Goffioul
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2 ## Copyright (C) 2007-2009 David Bateman
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3 ##
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4 ## This file is part of Octave.
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5 ##
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6 ## Octave is free software; you can redistribute it and/or modify it
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7 ## under the terms of the GNU General Public License as published by
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8 ## the Free Software Foundation; either version 3 of the License, or (at
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9 ## your option) any later version.
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10 ##
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11 ## Octave is distributed in the hope that it will be useful, but
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ## General Public License for more details.
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15 ##
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16 ## You should have received a copy of the GNU General Public License
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17 ## along with Octave; see the file COPYING. If not, see
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18 ## <http://www.gnu.org/licenses/>.
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19
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {} area (@var{x}, @var{y})
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22 ## @deftypefnx {Function File} {} area (@var{x}, @var{y}, @var{lvl})
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23 ## @deftypefnx {Function File} {} area (@dots{}, @var{prop}, @var{val}, @dots{})
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24 ## @deftypefnx {Function File} {} area (@var{y}, @dots{})
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25 ## @deftypefnx {Function File} {} area (@var{h}, @dots{})
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26 ## @deftypefnx {Function File} {@var{h} =} area (@dots{})
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27 ## Area plot of cumulative sum of the columns of @var{y}. This shows the
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28 ## contributions of a value to a sum, and is functionally similar to
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29 ## @code{plot (@var{x}, cumsum (@var{y}, 2))}, except that the area under
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30 ## the curve is shaded.
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31 ##
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32 ## If the @var{x} argument is omitted it is assumed to be given by
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33 ## @code{1 : rows (@var{y})}. A value @var{lvl} can be defined that determines
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34 ## where the base level of the shading under the curve should be defined.
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35 ##
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36 ## Additional arguments to the @code{area} function are passed to
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37 ## @code{patch}.
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38 ##
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39 ## The optional return value @var{h} is a graphics handle to the hggroup
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40 ## object representing the area patch objects.
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41 ## @seealso{plot, patch}
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42 ## @end deftypefn
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43
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44 function h = area (varargin)
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45
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46 [ax, varargin, nargin] = __plt_get_axis_arg__ ("area", varargin{:});
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47
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48 if (nargin > 0)
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49 idx = 1;
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50 x = y = [];
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51 bv = 0;
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52 args = {};
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53 ## Check for (X) or (X,Y) arguments and possible base value.
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54 if (nargin >= idx && ismatrix (varargin{idx}))
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55 y = varargin{idx};
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56 idx++;
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57 if (nargin >= idx)
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58 if (isscalar (varargin{idx}))
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59 bv = varargin{idx};
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60 idx++;
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61 elseif (ismatrix (varargin{idx}))
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62 x = y;
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63 y = varargin{idx};
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64 idx++;
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65 if (nargin >= idx && isscalar (varargin{idx}))
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66 bv = varargin{idx};
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67 idx++;
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68 endif
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69 endif
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70 endif
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71 else
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72 print_usage ();
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73 endif
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74 ## Check for additional args.
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75 if (nargin >= idx)
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76 args = {varargin{idx:end}};
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77 endif
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78 newplot ();
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79 if (isvector (y))
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80 y = y(:);
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81 endif
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82 if (isempty (x))
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83 x = repmat ([1:size(y, 1)]', 1, size (y, 2));
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84 elseif (isvector (x))
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85 x = repmat (x(:), 1, size (y, 2));
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86 endif
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87
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88 oldax = gca ();
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89 unwind_protect
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90 axes (ax);
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91 tmp = __area__ (ax, x, y, bv, args{:});
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92 unwind_protect_cleanup
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93 axes (oldax);
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94 end_unwind_protect
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95
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96 if (nargout > 0)
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97 h = tmp;
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98 endif
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99 else
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100 print_usage ();
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101 endif
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102
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103 endfunction
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104
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105 function retval = __area__ (ax, x, y, bv, varargin)
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106
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107 y0 = bv * ones (1, rows (y));
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108 y0 = zeros (1, rows (y));
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109 retval = [];
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110 for i = 1: size (y, 2);
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111 hg = hggroup ();
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112 retval = [retval; hg];
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113 args = __add_datasource__ ("area", hg, {"x", "y"}, varargin{:});
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114
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115 x1 = x(:, 1).';
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116 y1 = y (:, i).';
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117 addproperty ("xdata", hg, "data", x1);
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118 addproperty ("ydata", hg, "data", y1);
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119
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120 addlistener (hg, "xdata", @update_data);
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121 addlistener (hg, "ydata", @update_data);
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122
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123 if (i == 1)
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124 h = patch (ax, [x1(1), x1, fliplr(x1)], [bv, y1, bv*ones(1, length(y1))],
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125 __next_line_color__ (), "parent", hg);
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126 else
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127 y1 = y0 + y1;
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128 h = patch (ax, [x1(1), x1, fliplr(x1)], [y0(1), y1, fliplr(y0)],
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129 __next_line_color__ (), "parent", hg);
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130 endif
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131
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132 y0 = y1;
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133
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134 addproperty ("basevalue", hg, "data", bv);
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135 addlistener (hg, "basevalue", @move_baseline);
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136
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137 addproperty ("edgecolor", hg, "patchedgecolor", get (h, "edgecolor"));
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138 addproperty ("linewidth", hg, "patchlinewidth", get (h, "linewidth"));
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139 addproperty ("linestyle", hg, "patchlinestyle", get (h, "linestyle"));
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140 addproperty ("facecolor", hg, "patchfacecolor", get (h, "facecolor"));
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141
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142 addlistener (hg, "edgecolor", @update_props);
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143 addlistener (hg, "linewidth", @update_props);
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144 addlistener (hg, "linestyle", @update_props);
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145 addlistener (hg, "facecolor", @update_props);
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146
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147 addproperty ("areagroup", hg, "data");
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148 set (retval, "areagroup", retval);
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149
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150 if (! isempty (args))
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151 set (hg, args{:});
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152 endif
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153 endfor
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154
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155 endfunction
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156
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157 function update_props (h, d)
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158 kids = get (h, "children");
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159 set (kids, "edgecolor", get (h, "edgecolor"),
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160 "linewidth", get (h, "linewidth"),
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161 "linestyle", get (h, "linestyle"),
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162 "facecolor", get (h, "facecolor"));
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163 endfunction
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164
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165 function move_baseline (h, d)
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166 persistent recursion = false;
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167
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168 ## Don't allow recursion
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169 if (! recursion)
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170 unwind_protect
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171 recursion = true;
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172 hlist = get (h, "areagroup");
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173 b0 = get (h, "basevalue");
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174
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175 for hh = hlist(:)'
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176 if (hh != h)
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177 b1 = get (hh, "basevalue");
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178 if (b1 != b0)
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179 set (hh, "basevalue", b0);
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180 endif
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181 endif
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182 endfor
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183 update_data (h, d);
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184 unwind_protect_cleanup
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185 recursion = false;
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186 end_unwind_protect
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187 endif
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188 endfunction
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189
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190 function update_data (h, d)
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191 hlist = get (h, "areagroup");
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192 bv = get (h, "basevalue");
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193 for i = 1 : length (hlist)
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194 hh = hlist(i);
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195 x1 = get (hh, "xdata")(:);
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196 y1 = get (hh, "ydata")(:);
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197
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198 set (get (hh, "children"), "xdata", [x1(1); x1; flipud(x1)]);
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199 if (i == 1)
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200 set (get (hh, "children"), "ydata", [bv; y1; bv*ones(length(y1), 1)]);
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201 else
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202 y1 = y0 + y1;
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203 set (get (hh, "children"), "ydata", [y0(1); y1; flipud(y0)]);
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204 endif
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205
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206 y0 = y1;
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207 endfor
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208 endfunction