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improve speed of cell2mat * * * trivial fix for previous cell2mat change
author David Bateman <dbateman@free.fr>
date Thu, 11 Sep 2008 16:57:12 -0400
parents aead4b9d026b
children c066714ee5d5
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1 ## Copyright (C) 2007 David Bateman
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} plotyy (@var{x1}, @var{y1}, @var{x2}, @var{y2})
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21 ## @deftypefnx {Function File} {} plotyy (@dots{}, @var{fun})
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22 ## @deftypefnx {Function File} {} plotyy (@dots{}, @var{fun1}, @var{fun2})
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23 ## @deftypefnx {Function File} {} plotyy (@var{h}, @dots{})
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24 ## @deftypefnx {Function File} {[@var{ax}, @var{h1}, @var{h2}] =} plotyy (@dots{})
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25 ## Plots two sets of data with independent y-axes. The arguments @var{x1} and
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26 ## @var{y1} define the arguments for the first plot and @var{x1} and @var{y2}
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27 ## for the second.
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28 ##
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29 ## By default the arguments are evaluated with
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30 ## @code{feval (@@plot, @var{x}, @var{y})}. However the type of plot can be
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31 ## modified with the @var{fun} argument, in which case the plots are
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32 ## generated by @code{feval (@var{fun}, @var{x}, @var{y})}. @var{fun} can be
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33 ## a function handle, an inline function or a string of a function name.
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34 ##
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35 ## The function to use for each of the plots can be independently defined
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36 ## with @var{fun1} and @var{fun2}.
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37 ##
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38 ## If given, @var{h} defines the principal axis in which to plot the @var{x1}
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39 ## and @var{y1} data. The return value @var{ax} is a two element vector with
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40 ## the axis handles of the two plots. @var{h1} and @var{h2} are handles to
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41 ## the objects generated by the plot commands.
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42 ##
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43 ## @example
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44 ## @group
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45 ## x = 0:0.1:2*pi;
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46 ## y1 = sin (x);
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47 ## y2 = exp (x - 1);
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48 ## ax = plotyy (x, y1, x - 1, y2, @@plot, @@semilogy);
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49 ## xlabel ("X");
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50 ## ylabel (ax(1), "Axis 1");
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51 ## ylabel (ax(2), "Axis 2");
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52 ## @end group
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53 ## @end example
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54 ## @end deftypefn
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55
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56 function [Ax, H1, H2] = plotyy (varargin)
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57
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58 ## Don't use __plt_get_axis_arg__ here as ax is a two vector for plotyy
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59 if (nargin > 1 && length (varargin{1}) == 2 && ishandle(varargin{1}(1))
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60 && ishandle(varargin{1}(2)) &&
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61 all (floor (varargin{1}) != varargin{1}))
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62 obj1 = get (varargin{1}(1));
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63 obj2 = get (varargin{1}(2));
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64 if (strcmp (obj1.type, "axes") || strcmp (obj2.type, "axes"))
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65 ax = [obj1, obj2];
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66 varargin(1) = [];
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67 if (isempty (varargin))
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68 varargin = {};
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69 endif
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70 else
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71 error ("plotyy: expecting first argument to be axes handle");
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72 endif
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73 else
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74 f = get (0, "currentfigure");
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75 if (isempty (f))
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76 ax(1) = axes ();
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77 ax(2) = axes ();
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78 else
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79 ax = get (f, "children");
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80 if (length (ax) > 2)
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81 for i = 3 : length (ax)
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82 delete (ax (i));
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83 endfor
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84 ax = ax(1:2);
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85 elseif (length (ax) == 1)
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86 ax(2) = axes ();
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87 endif
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88 endif
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89 if (nargin < 2)
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90 varargin = {};
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91 endif
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92 endif
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93
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94 if (nargin < 4)
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95 print_usage ();
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96 endif
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97
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98 oldh = gca ();
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99 unwind_protect
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100 [ax, h1, h2] = __plotyy__ (ax, varargin{:});
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101 unwind_protect_cleanup
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102 axes (oldh);
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103 end_unwind_protect
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104
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105 if (nargout > 0)
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106 Ax = ax;
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107 H1 = h1;
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108 H2 = h2;
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109 endif
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110
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111 endfunction
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112
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113 function [ax, h1, h2] = __plotyy__ (ax, x1, y1, x2, y2, varargin)
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114 if (nargin > 5)
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115 fun1 = varargin{1};
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116 else
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117 fun1 = @plot;
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118 endif
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119 if (nargin > 6)
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120 fun2 = varargin{2};
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121 else
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122 fun2 = fun1;
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123 endif
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124
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125 xlim = [min([x1(:); x2(:)]), max([x1(:); x2(:)])];
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126
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127 axes (ax(1));
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128 newplot ();
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129 h1 = feval (fun1, x1, y1);
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130
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131 set (ax(1), "ycolor", getcolor (h1(1)));
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132 set (ax(1), "xlim", xlim);
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133
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134 cf = gcf ();
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135 set (cf, "nextplot", "add");
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136 axes (ax(2));
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137 newplot ();
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138
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139 colors = get (ax(1), "colororder");
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140 set (ax(2), "colororder", [colors(2:end,:); colors(1,:)]);
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141
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142 h2 = feval (fun2, x2, y2);
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143 set (ax(2), "yaxislocation", "right");
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144 set (ax(2), "ycolor", getcolor (h2(1)));
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145 set (ax(2), "position", get (ax(1), "position"));
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146 set (ax(2), "xlim", xlim);
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147 set (ax(2), "color", "none");
8101
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148
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149 ## Add invisible text objects that when destroyed,
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150 ## also remove the other axis
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151 t1 = text (0, 0, "", "parent", ax(1), "tag", "plotyy",
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152 "handlevisibility", "off", "visible", "off",
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153 "xliminclude", "off", "yliminclude", "off");
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154 t2 = text (0, 0, "", "parent", ax(2), "tag", "plotyy",
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155 "handlevisibility", "off", "visible", "off",
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156 "xliminclude", "off", "yliminclude", "off");
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157
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158 set (t1, "deletefcn", {@deleteplotyy, ax(2), t2});
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159 set (t2, "deletefcn", {@deleteplotyy, ax(1), t1});
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160
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161 addlistener (ax(1), "position", {@update_position, ax(2)});
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162 addlistener (ax(2), "position", {@update_position, ax(1)});
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163 addlistener (ax(1), "view", {@update_position, ax(2)});
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164 addlistener (ax(2), "view", {@update_position, ax(1)});
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165
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166 ## Tag the plotyy axes, so we can use that information
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167 ## not to mirror the y axis tick marks
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168 set (ax, "tag", "plotyy")
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169
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170 endfunction
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171
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172 %!demo
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173 %! x = 0:0.1:2*pi;
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174 %! y1 = sin (x);
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175 %! y2 = exp (x - 1);
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176 %! ax = plotyy (x, y1, x - 1, y2, @plot, @semilogy);
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177 %! xlabel ("X");
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178 %! ylabel (ax(1), "Axis 1");
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179 %! ylabel (ax(2), "Axis 2");
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180
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181 function deleteplotyy (h, d, ax2, t2)
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182 if (ishandle (ax2) && strcmp (get (ax2, "type"), "axes") &&
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183 (isempty (gcbf()) || strcmp (get (gcbf(), "beingdeleted"),"off")) &&
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184 strcmp (get (ax2, "beingdeleted"), "off"))
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185 set (t2, "deletefcn", []);
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186 delete (ax2);
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187 endif
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188 endfunction
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189
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190 function update_position (h, d, ax2)
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191 persistent recursion = false;
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192
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193 ## Don't allow recursion
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194 if (! recursion)
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195 unwind_protect
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196 recursion = true;
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197 position = get (h, "position");
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198 view = get (h, "view");
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199 oldposition = get (ax2, "position");
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200 oldview = get (ax2, "view");
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201 if (! (isequal (position, oldposition) && isequal (view, oldview)))
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202 set (ax2, "position", position, "view", view);
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203 endif
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204 unwind_protect_cleanup
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205 recursion = false;
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206 end_unwind_protect
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207 endif
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208 endfunction
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209
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210 function color = getcolor (ax)
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211 obj = get (ax);
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212 if (isfield (obj, "color"))
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213 color = obj.color;
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214 elseif (isfield (obj, "facecolor") && ! ischar (obj.facecolor))
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215 color = obj.facecolor;
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216 elseif (isfield (obj, "edgecolor") && ! ischar (obj.edgecolor))
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217 color = obj.edgecolor;
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218 else
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219 color = [0, 0, 0];
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220 endif
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221 endfunction
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222