Mercurial > hg > octave-nkf
annotate scripts/plot/plotyy.m @ 8769:a186c5b4f264
plotyy.m: handle existing figure with no axes
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 17 Feb 2009 00:01:33 -0500 |
| parents | be9b14945774 |
| children | a013ff655ca4 |
| rev | line source |
|---|---|
| 7195 | 1 ## Copyright (C) 2007 David Bateman |
| 2 ## | |
| 3 ## This file is part of Octave. | |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7 ## the Free Software Foundation; either version 3 of the License, or (at | |
| 8 ## your option) any later version. | |
| 9 ## | |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 16 ## along with Octave; see the file COPYING. If not, see | |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 18 | |
| 19 ## -*- texinfo -*- | |
| 20 ## @deftypefn {Function File} {} plotyy (@var{x1}, @var{y1}, @var{x2}, @var{y2}) | |
| 21 ## @deftypefnx {Function File} {} plotyy (@dots{}, @var{fun}) | |
| 22 ## @deftypefnx {Function File} {} plotyy (@dots{}, @var{fun1}, @var{fun2}) | |
| 23 ## @deftypefnx {Function File} {} plotyy (@var{h}, @dots{}) | |
| 24 ## @deftypefnx {Function File} {[@var{ax}, @var{h1}, @var{h2}] =} plotyy (@dots{}) | |
| 25 ## Plots two sets of data with independent y-axes. The arguments @var{x1} and | |
| 26 ## @var{y1} define the arguments for the first plot and @var{x1} and @var{y2} | |
| 27 ## for the second. | |
| 28 ## | |
| 29 ## By default the arguments are evaluated with | |
| 30 ## @code{feval (@@plot, @var{x}, @var{y})}. However the type of plot can be | |
| 31 ## modified with the @var{fun} argument, in which case the plots are | |
| 32 ## generated by @code{feval (@var{fun}, @var{x}, @var{y})}. @var{fun} can be | |
| 33 ## a function handle, an inline function or a string of a function name. | |
| 34 ## | |
| 35 ## The function to use for each of the plots can be independently defined | |
| 36 ## with @var{fun1} and @var{fun2}. | |
| 37 ## | |
| 38 ## If given, @var{h} defines the principal axis in which to plot the @var{x1} | |
| 39 ## and @var{y1} data. The return value @var{ax} is a two element vector with | |
| 40 ## the axis handles of the two plots. @var{h1} and @var{h2} are handles to | |
| 41 ## the objects generated by the plot commands. | |
| 42 ## | |
| 43 ## @example | |
| 44 ## @group | |
| 45 ## x = 0:0.1:2*pi; | |
| 46 ## y1 = sin (x); | |
| 7196 | 47 ## y2 = exp (x - 1); |
| 48 ## ax = plotyy (x, y1, x - 1, y2, @@plot, @@semilogy); | |
| 7195 | 49 ## xlabel ("X"); |
| 50 ## ylabel (ax(1), "Axis 1"); | |
| 51 ## ylabel (ax(2), "Axis 2"); | |
| 52 ## @end group | |
| 53 ## @end example | |
| 54 ## @end deftypefn | |
| 55 | |
| 56 function [Ax, H1, H2] = plotyy (varargin) | |
| 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"); |
| 8208 | 80 if (length (ax) > 2) |
| 81 for i = 3 : length (ax) | |
| 82 delete (ax (i)); | |
| 83 endfor | |
| 84 ax = ax(1:2); | |
| 85 elseif (length (ax) == 1) | |
| 86 ax(2) = axes (); | |
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87 elseif (isempty (ax)) |
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88 ax(1) = axes (); |
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89 ax(2) = axes (); |
| 8208 | 90 endif |
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91 endif |
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92 if (nargin < 2) |
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93 varargin = {}; |
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94 endif |
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95 endif |
| 7215 | 96 |
| 97 if (nargin < 4) | |
| 98 print_usage (); | |
| 99 endif | |
| 7216 | 100 |
| 7215 | 101 oldh = gca (); |
| 102 unwind_protect | |
| 103 [ax, h1, h2] = __plotyy__ (ax, varargin{:}); | |
| 104 unwind_protect_cleanup | |
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105 ## Only change back to the old axis if we didn't delete it |
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106 if (ishandle(oldh) && strcmp (get (oldh, "type"), "axes")) |
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107 axes (oldh); |
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108 endif |
| 7215 | 109 end_unwind_protect |
| 7195 | 110 |
| 111 if (nargout > 0) | |
| 112 Ax = ax; | |
| 113 H1 = h1; | |
| 114 H2 = h2; | |
| 115 endif | |
| 7196 | 116 |
| 7195 | 117 endfunction |
| 118 | |
| 119 function [ax, h1, h2] = __plotyy__ (ax, x1, y1, x2, y2, varargin) | |
| 120 if (nargin > 5) | |
| 121 fun1 = varargin{1}; | |
| 122 else | |
| 123 fun1 = @plot; | |
| 124 endif | |
| 125 if (nargin > 6) | |
| 126 fun2 = varargin{2}; | |
| 127 else | |
| 128 fun2 = fun1; | |
| 129 endif | |
| 130 | |
| 131 xlim = [min([x1(:); x2(:)]), max([x1(:); x2(:)])]; | |
| 132 | |
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133 if (ishandle(ax(1)) && strcmp (get (ax(1), "type"), "axes")) |
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134 axes (ax(1)); |
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135 else |
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136 ax(1) = axes (); |
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137 endif |
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138 newplot (); |
| 7195 | 139 h1 = feval (fun1, x1, y1); |
| 7220 | 140 |
| 141 set (ax(1), "ycolor", getcolor (h1(1))); | |
| 7195 | 142 set (ax(1), "xlim", xlim); |
| 143 | |
| 144 cf = gcf (); | |
| 145 set (cf, "nextplot", "add"); | |
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146 |
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147 if (ishandle(ax(2)) && strcmp (get (ax(2), "type"), "axes")) |
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148 axes (ax(2)); |
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149 else |
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150 ax(2) = axes (); |
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151 endif |
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152 newplot (); |
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153 |
| 7195 | 154 colors = get (ax(1), "colororder"); |
| 155 set (ax(2), "colororder", [colors(2:end,:); colors(1,:)]); | |
| 156 | |
| 157 h2 = feval (fun2, x2, y2); | |
| 7206 | 158 set (ax(2), "yaxislocation", "right"); |
| 7220 | 159 set (ax(2), "ycolor", getcolor (h2(1))); |
| 7240 | 160 set (ax(2), "position", get (ax(1), "position")); |
| 7195 | 161 set (ax(2), "xlim", xlim); |
| 7240 | 162 set (ax(2), "color", "none"); |
| 8208 | 163 |
| 164 ## Add invisible text objects that when destroyed, | |
| 165 ## also remove the other axis | |
| 166 t1 = text (0, 0, "", "parent", ax(1), "tag", "plotyy", | |
| 167 "handlevisibility", "off", "visible", "off", | |
| 168 "xliminclude", "off", "yliminclude", "off"); | |
| 169 t2 = text (0, 0, "", "parent", ax(2), "tag", "plotyy", | |
| 170 "handlevisibility", "off", "visible", "off", | |
| 171 "xliminclude", "off", "yliminclude", "off"); | |
| 172 | |
| 173 set (t1, "deletefcn", {@deleteplotyy, ax(2), t2}); | |
| 174 set (t2, "deletefcn", {@deleteplotyy, ax(1), t1}); | |
| 175 | |
| 176 addlistener (ax(1), "position", {@update_position, ax(2)}); | |
| 177 addlistener (ax(2), "position", {@update_position, ax(1)}); | |
| 178 addlistener (ax(1), "view", {@update_position, ax(2)}); | |
| 179 addlistener (ax(2), "view", {@update_position, ax(1)}); | |
| 180 | |
| 181 ## Tag the plotyy axes, so we can use that information | |
| 182 ## not to mirror the y axis tick marks | |
| 183 set (ax, "tag", "plotyy") | |
| 184 | |
| 185 endfunction | |
| 186 | |
| 187 %!demo | |
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188 %! close all; |
| 8208 | 189 %! x = 0:0.1:2*pi; |
| 190 %! y1 = sin (x); | |
| 191 %! y2 = exp (x - 1); | |
| 192 %! ax = plotyy (x, y1, x - 1, y2, @plot, @semilogy); | |
| 193 %! xlabel ("X"); | |
| 194 %! ylabel (ax(1), "Axis 1"); | |
| 195 %! ylabel (ax(2), "Axis 2"); | |
| 196 | |
| 197 function deleteplotyy (h, d, ax2, t2) | |
| 198 if (ishandle (ax2) && strcmp (get (ax2, "type"), "axes") && | |
| 199 (isempty (gcbf()) || strcmp (get (gcbf(), "beingdeleted"),"off")) && | |
| 200 strcmp (get (ax2, "beingdeleted"), "off")) | |
| 201 set (t2, "deletefcn", []); | |
| 202 delete (ax2); | |
| 203 endif | |
| 204 endfunction | |
| 205 | |
| 206 function update_position (h, d, ax2) | |
| 207 persistent recursion = false; | |
| 208 | |
| 209 ## Don't allow recursion | |
| 210 if (! recursion) | |
| 211 unwind_protect | |
| 212 recursion = true; | |
| 213 position = get (h, "position"); | |
| 214 view = get (h, "view"); | |
| 215 oldposition = get (ax2, "position"); | |
| 216 oldview = get (ax2, "view"); | |
| 217 if (! (isequal (position, oldposition) && isequal (view, oldview))) | |
| 218 set (ax2, "position", position, "view", view); | |
| 219 endif | |
| 220 unwind_protect_cleanup | |
| 221 recursion = false; | |
| 222 end_unwind_protect | |
| 223 endif | |
| 7195 | 224 endfunction |
| 7220 | 225 |
| 226 function color = getcolor (ax) | |
| 227 obj = get (ax); | |
| 228 if (isfield (obj, "color")) | |
| 229 color = obj.color; | |
| 230 elseif (isfield (obj, "facecolor") && ! ischar (obj.facecolor)) | |
| 231 color = obj.facecolor; | |
| 232 elseif (isfield (obj, "edgecolor") && ! ischar (obj.edgecolor)) | |
| 233 color = obj.edgecolor; | |
| 234 else | |
| 235 color = [0, 0, 0]; | |
| 236 endif | |
| 237 endfunction | |
| 7245 | 238 |