Mercurial > jwe > octave
annotate scripts/plot/draw/private/__ezplot__.m @ 28432:7a8c69c4eb55 stable
convert obsolete octave_fcn_inline object to @inline class
Use a legacy @class object to provide inline function objects instead
of using a built-in class derived from the octave_function_handle
class.
* scripts/legacy/@inline: New directory containing the following
files: argnames.m, char.m, feval.m, formula.m, inline.m, subsref.m,
vectorize.m.
* scripts/legacy/@inline/module.mk: New file.
* scripts/legacy/module.mk, scripts/module.mk: Update.
* test/inline-fcn.tst: New tests.
* test/module.mk: Update.
* ov-fcn-inline.h, ov-fcn-inline.cc: Delete. Remove all uses.
* libinterp/octave-value/module.mk: Update.
* external.txi, func.txi, octave.texi, plot.txi, quad.txi:
Eliminate discusion of inline function objects.
* fplot.m, __ezplot__.m: Use isa to identify inline objects instead of
instead of checking typeinfo.
* ov-fcn-handle.cc, ov-typeinfo.cc: Fix tests.
* ov-base.h, ov-base.cc (octave_base_value::fcn_inline_value): Delete.
* ov.h, ov.cc (octave_value::fcn_inline_value): Delete.
(octave_value::xfcn_inline_value): Delete value extractor.
* ov-class.cc, ov-class.h (octave_inline, octave_inline_fcn):
New classes that allow us to preserve the is_inline_function and
function_value methods that were previously available in the
octave_fcn_inline class.
(F__inline_ctor__): New function for final construction of inline
objects.
* ls-hdf5.cc, ls-mat5.cc, ls-oct-binary.cc, ls-oct-text.cc:
Handle loading of inline function objects from old files as special
cases. New inline function objects will be saved and loaded as
ordinary @class objects.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 23 Mar 2020 15:29:49 -0400 |
parents | bd51beb6205e |
children | e3a337a57588 0a5b15007766 |
rev | line source |
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1 ######################################################################## |
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2 ## |
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3 ## Copyright (C) 2007-2020 The Octave Project Developers |
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4 ## |
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5 ## See the file COPYRIGHT.md in the top-level directory of this |
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6 ## distribution or <https://octave.org/copyright/>. |
7337 | 7 ## |
8 ## This file is part of Octave. | |
9 ## | |
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10 ## Octave is free software: you can redistribute it and/or modify it |
7337 | 11 ## under the terms of the GNU General Public License as published by |
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12 ## the Free Software Foundation, either version 3 of the License, or |
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13 ## (at your option) any later version. |
7337 | 14 ## |
15 ## Octave is distributed in the hope that it will be useful, but | |
16 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 ## GNU General Public License for more details. |
7337 | 19 ## |
20 ## You should have received a copy of the GNU General Public License | |
21 ## along with Octave; see the file COPYING. If not, see | |
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22 ## <https://www.gnu.org/licenses/>. |
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23 ## |
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24 ######################################################################## |
7337 | 25 |
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26 ## -*- texinfo -*- |
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27 ## @deftypefn {} {[@var{h}, @var{needusage}] =} __ezplot__ (@var{pltfunc}, @var{varargin}) |
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28 ## Undocumented internal function. |
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29 ## @end deftypefn |
7337 | 30 |
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31 ## Overview: This function is the back-end for the 9 ez* plot functions. |
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32 ## As such, most of the function is actually dedicated to sorting |
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33 ## out the inputs and verifying that the particular ez* function |
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34 ## called was called correctly. The actual plotting occurs near |
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35 ## the end in an unwind_protect block. |
7337 | 36 |
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37 function [h, needusage] = __ezplot__ (pltfunc, varargin) |
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38 |
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39 ezfunc = ["ez" pltfunc]; |
7337 | 40 |
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41 [hax, varargin, nargin] = __plt_get_axis_arg__ (ezfunc, varargin{:}); |
7337 | 42 |
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43 ## Define outputs early in case of shorting out of function with return; |
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44 h = []; |
7337 | 45 needusage = false; |
46 if (nargin < 1) | |
47 needusage = true; | |
48 return; | |
49 endif | |
50 | |
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51 iscontour = strncmp (pltfunc, "contour", 7); |
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52 |
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53 ## Defaults for ezplot |
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54 isplot = true; |
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55 isplot3 = false; |
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56 ispolar = false; |
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57 nargs = 1; |
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58 switch (pltfunc) |
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59 case "plot" |
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60 ## defaults already set |
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61 |
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62 case "plot3" |
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63 isplot = false; |
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64 isplot3 = true; |
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65 |
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66 case "polar" |
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67 isplot = false; |
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68 ispolar = true; |
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69 |
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70 otherwise |
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71 ## contour, mesh, surf plots |
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72 isplot = false; |
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73 nargs = 2; |
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74 |
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75 endswitch |
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76 |
7337 | 77 parametric = false; |
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78 fun = varargin{1}; |
7337 | 79 if (ischar (fun)) |
8046 | 80 if (exist (fun, "file") || exist (fun, "builtin")) |
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81 fun = str2func (fun); # convert to function handle |
8046 | 82 else |
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83 fun = vectorize (inline (fun)); # convert to inline function |
7337 | 84 endif |
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85 endif |
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86 |
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87 if (isa (fun, "inline")) |
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88 argids = argnames (fun); |
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89 if (isplot && length (argids) == 2) |
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91 elseif (numel (argids) != nargs) |
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92 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
7337 | 93 endif |
94 fun = vectorize (fun); | |
95 fstr = formula (fun); | |
8046 | 96 if (isplot) |
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97 xarg = argids{1}; |
8046 | 98 if (nargs == 2) |
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99 yarg = argids{2}; |
8046 | 100 else |
10549 | 101 yarg = ""; |
8046 | 102 endif |
103 elseif (isplot3) | |
7337 | 104 xarg = "x"; |
105 yarg = "y"; | |
8046 | 106 elseif (isplot || ispolar) |
7337 | 107 xarg = ""; |
108 yarg = ""; | |
109 else | |
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110 xarg = argids{1}; |
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111 yarg = argids{2}; |
7337 | 112 endif |
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113 elseif (is_function_handle (fun)) |
7337 | 114 fstr = func2str (fun); |
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115 idx = index (fstr, ')'); |
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116 if (idx != 0) |
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117 args = regexp (fstr(3:(idx-1)), '\w+', 'match'); |
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118 fstr = fstr(idx+2:end); # remove '@(x) ' from string name |
8046 | 119 else |
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120 args = {"x"}; |
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121 try |
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122 if (builtin ("nargin", fun) == 2) |
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123 args{2} = "y"; |
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124 endif |
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125 end_try_catch |
8046 | 126 endif |
127 if (isplot && length (args) == 2) | |
128 nargs = 2; | |
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129 elseif (numel (args) != nargs) |
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130 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
7337 | 131 endif |
8046 | 132 if (isplot) |
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133 xarg = args{1}; |
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135 yarg = args{2}; |
8046 | 136 else |
10549 | 137 yarg = ""; |
8046 | 138 endif |
139 elseif (isplot3) | |
7337 | 140 xarg = "x"; |
141 yarg = "y"; | |
142 elseif (ispolar) | |
143 xarg = ""; | |
144 yarg = ""; | |
145 else | |
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146 xarg = args{1}; |
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147 yarg = args{2}; |
7337 | 148 endif |
149 else | |
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150 error ("%s: F must be a string or function handle", ezfunc); |
7337 | 151 endif |
152 | |
8046 | 153 if (nargin > 2 || (nargin == 2 && isplot)) |
7337 | 154 funx = fun; |
155 fstrx = fstr; | |
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156 funy = varargin{2}; |
7337 | 157 if (ischar (funy) && ! strcmp (funy, "circ") && ! strcmp (funy, "animate")) |
158 parametric = true; | |
8046 | 159 if (exist (funy, "file") || exist (funy, "builtin")) |
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160 funy = inline ([funy "(t)"]); |
8046 | 161 else |
10549 | 162 funy = vectorize (inline (funy)); |
8046 | 163 endif |
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164 if (numel (argnames (funy)) != nargs) |
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165 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
7337 | 166 endif |
167 fstry = formula (funy); | |
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168 elseif (isa (funy, "inline")) |
7337 | 169 parametric = true; |
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170 if (numel (argnames (funy)) != nargs) |
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171 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
7337 | 172 endif |
173 funy = vectorize (funy); | |
174 fstry = formula (funy); | |
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175 elseif (is_function_handle (funy)) |
7337 | 176 parametric = true; |
177 fstry = func2str (funy); | |
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178 idx = index (fstry, ')'); |
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179 if (idx != 0) |
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180 args = regexp (fstry(3:(idx-1)), '\w+', 'match'); |
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181 fstry = fstry(idx+2:end); # remove '@(x) ' from string name |
8046 | 182 else |
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183 args = {"y"}; |
8046 | 184 endif |
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185 if (numel (args) != nargs) |
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186 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
7337 | 187 endif |
8046 | 188 endif |
189 | |
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190 if (! parametric && isplot3) |
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191 needusage = true; # Can't call non-parametric ezplot3 |
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192 return; |
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193 elseif (parametric && isplot) |
8046 | 194 if (nargs == 2) |
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195 error ("%s: can not define a parametric function in this manner", ezfunc); |
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196 else |
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197 xarg = "x"; |
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198 yarg = "y"; |
8046 | 199 endif |
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200 elseif (parametric) |
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201 funz = varargin{3}; |
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202 if (ischar (funz) && ! strcmp (funz, "circ") |
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203 && ! strcmp (funz, "animate")) |
10549 | 204 if (exist (funz, "file") || exist (funz, "builtin")) |
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205 funz = inline ([funz "(t)"]); |
10549 | 206 else |
207 funz = vectorize (inline (funz)); | |
208 endif | |
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209 if (numel (argnames (funz)) > nargs) |
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210 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
10549 | 211 endif |
212 fstrz = formula (funz); | |
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213 elseif (isa (funz, "inline")) |
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214 if (numel (argnames (funz)) != nargs) |
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215 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
10549 | 216 endif |
217 funz = vectorize (funz); | |
218 fstrz = formula (funz); | |
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219 elseif (is_function_handle (funz)) |
10549 | 220 fstrz = func2str (funz); |
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221 idx = index (fstrz, ')'); |
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222 if (idx != 0) |
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223 args = regexp (fstrz(3:(idx-1)), '\w+', 'match'); |
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224 fstrz = fstrz(idx+2:end); # remove '@(x) ' from string name |
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225 else |
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226 args = {"z"}; |
10549 | 227 endif |
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228 if (numel (args) != nargs) |
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229 error ("%s: expecting a function of %d arguments", ezfunc, nargs); |
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230 endif |
7337 | 231 else |
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232 error ("%s: parametric plots require 3 functions", ezfunc); |
7337 | 233 endif |
234 endif | |
235 endif | |
236 | |
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237 if ((isplot && nargs != 2) || isplot3 || ispolar) |
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238 n = 500; # default for point-style functions like plot |
8046 | 239 else |
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240 n = 60; # default for meshgrid style functions like contour, surf |
8046 | 241 endif |
7337 | 242 domain = []; |
243 circ = false; | |
244 animate = false; | |
245 if (parametric) | |
8046 | 246 if (isplot) |
247 iarg = 3; | |
248 else | |
249 iarg = 4; | |
250 endif | |
7337 | 251 else |
252 iarg = 2; | |
253 endif | |
254 while (iarg <= nargin) | |
255 arg = varargin{iarg++}; | |
256 if (ischar (arg) && strcmp (arg, "circ")) | |
257 circ = true; | |
258 elseif (ischar (arg) && strcmp (arg, "animate")) | |
259 animate = true; | |
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260 elseif (isscalar (arg) && (n == 60 || n == 500)) |
7337 | 261 n = arg; |
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262 elseif (numel (arg) == 2 && isempty (domain)) |
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263 domain = [arg(1) arg(2) arg(1) arg(2)]; |
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264 elseif (numel (arg) == 4 && isempty (domain)) |
7337 | 265 domain = arg(:).'; |
266 else | |
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267 error ("%s: expecting scalar N, or 2-/4-element vector DOM", ezfunc); |
7337 | 268 endif |
269 endwhile | |
270 | |
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271 if (circ && (iscontour || isplot3 || isplot)) |
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272 needusage = true; |
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273 return; |
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274 elseif (circ && parametric) |
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275 error ("%s: can not have both circular domain and parametric function", |
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276 ezfunc); |
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277 endif |
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278 |
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279 if (animate && ! isplot3) |
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280 error ("%s: animate option only valid for ezplot3", ezfunc); |
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281 endif |
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282 |
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283 if (parametric) |
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284 ## Make the label strings pretty by removing extra spaces between base |
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285 ## and exponent, the '.' in vectorized code, and the '*' for multiply. |
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286 fstrx = regexprep (regexprep (regexprep (fstrx, |
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287 '\s*\.?(?:\^|\*\*)\s*','^'), '\.([/+-])', '$1'), '\s*\.?\*\s*', ' '); |
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288 fstry = regexprep (regexprep (regexprep (fstry, |
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289 '\s*\.?(?:\^|\*\*)\s*','^'), '\.([/+-])', '$1'), '\s*\.?\*\s*', ' '); |
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290 if (isplot) |
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291 fstr = ["x = " fstrx ", y = " fstry]; |
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292 else |
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293 fstrz = regexprep (regexprep (regexprep (fstrz, |
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294 '\s*\.?(?:\^|\*\*)\s*','^'), '\.([/+-])', '$1'), '\s*\.?\*\s*', ' '); |
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295 fstr = ["x = " fstrx ", y = " fstry ", z = " fstrz]; |
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296 endif |
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297 else |
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298 fstr = regexprep (regexprep (regexprep (fstr, |
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299 '\s*\.?(?:\^|\*\*)\s*','^'), '\.([/+-])', '$1'), '\s*\.?\*\s*', ' '); |
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300 if (isplot && nargs == 2) |
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301 fstr = [fstr " = 0"]; # make title string of implicit function |
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302 elseif (ispolar) |
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303 fstr = ["r = " fstr]; |
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304 endif |
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305 endif |
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306 |
7337 | 307 if (isempty (domain)) |
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308 auto_domain = true; |
7337 | 309 if (isplot3 || ispolar) |
310 domain = [0, 2*pi, 0, 2*pi]; | |
311 else | |
312 domain = [-2*pi, 2*pi, -2*pi, 2*pi]; | |
313 endif | |
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314 else |
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315 auto_domain = false; |
7337 | 316 endif |
317 | |
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318 auto_domain_done = false; |
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319 do |
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320 domain_ok = true; |
8046 | 321 |
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322 if ((isplot && nargs == 1) || isplot3 || ispolar) |
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323 X = linspace (domain(1), domain(2), n); |
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324 elseif (isplot && numel (domain) == 2) |
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325 x = linspace (domain(1), domain(2), n); |
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326 [X, Y] = meshgrid (x, x); |
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327 elseif (circ) |
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328 ## To plot on circular domain develop grid in polar coordinates |
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329 ## and then switch these to Cartesian coordinates. |
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330 cent = [domain(1) + domain(2), domain(3) + domain(4)] / 2; |
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331 rmax = sqrt ((domain(2) - cent(1))^2 + (domain(4) - cent(2))^2); |
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332 r = linspace (0, rmax, n); |
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333 t = linspace (0, 2*pi, n); |
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334 [T, R] = meshgrid (t, r); |
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335 X = R .* cos (T) + cent(1); |
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336 Y = R .* sin (T) + cent(2); |
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337 domain = [-rmax+cent(1), +rmax+cent(1), -rmax+cent(2), +rmax+cent(2)]; |
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338 else # contour, mesh, surf plots |
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339 x = linspace (domain(1), domain(2), n); |
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340 y = linspace (domain(3), domain(4), n); |
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341 [X, Y] = meshgrid (x, y); |
7337 | 342 endif |
343 | |
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344 if (parametric) |
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345 if (isplot) |
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346 XX = feval (funx, X); |
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347 Z = feval (funy, X); |
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348 X = XX; |
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|
349 elseif (isplot3) |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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|
350 Z = feval (funz, X); |
78f57b14535c
Overhaul ez* family of plot functions.
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changeset
|
351 XX = feval (funx, X); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
352 YY = feval (funy, X); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
353 X = XX; |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
354 Y = YY; |
8046 | 355 else |
16993
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
356 Z = feval (funz, X, Y); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
357 XX = feval (funx, X, Y); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
358 YY = feval (funy, X, Y); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
359 X = XX; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
360 Y = YY; |
8046 | 361 |
16993
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
362 ## Eliminate the singularities |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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|
363 X = __eliminate_sing__ (X); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
364 Y = __eliminate_sing__ (Y); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
365 Z = __eliminate_sing__ (Z); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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|
366 endif |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
367 else ## non-parametric plots |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
368 if (isplot && nargs == 2) |
10549 | 369 Z = feval (fun, X, Y); |
8046 | 370 |
16993
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Overhaul ez* family of plot functions.
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parents:
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changeset
|
371 ## Matlab returns line objects for this case and so can't call |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
372 ## contour directly as it returns patch objects to allow colormaps |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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|
373 ## to work with contours. Therefore recreate the lines from the |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
374 ## output for contourc, and store in cell arrays. |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
375 [c, ~] = contourc (X, Y, Z, [0, 0]); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
376 |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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changeset
|
377 i = 1; |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
378 XX = YY = {}; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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changeset
|
379 while (i < length (c)) |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
380 clev = c(1,i); |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
381 clen = c(2,i); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
382 XX = [XX, {c(1, i+1:i+clen)}]; |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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changeset
|
383 YY = [YY, {c(2, i+1:i+clen)}]; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
384 i += clen+1; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
385 endwhile |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
386 else |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
387 if (ispolar) |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
388 Z = feval (fun, X); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
389 ## FIXME: Why aren't singularities eliminated for polar plots? |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
390 elseif (isplot) |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
391 Z = feval (fun, X); |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
392 ## Eliminate the singularities |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
393 Z = __eliminate_sing__ (Z); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
394 domain = find_valid_domain (X, [], Z); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
395 elseif (iscontour) |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
396 Z = feval (fun, X, Y); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
397 Z = __eliminate_sing__ (Z); |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
398 else # mesh, surf plots |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
399 Z = feval (fun, X, Y); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
400 Z = __eliminate_sing__ (Z); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
401 if (circ) |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
402 ## Use domain calculated at the start. |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
403 ## The X, Y grids are non-monotonic after conversion from polar |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
404 ## coordinates and find_valid_domain fails. |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
405 |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
406 elseif (auto_domain && ! auto_domain_done) |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
407 valid_domain = find_valid_domain (X, Y, Z); |
22882
9b096bffc10d
Fix plotting of constant functions with ezplot (bug #49766).
Rik <rik@octave.org>
parents:
22767
diff
changeset
|
408 domain_ok = all (domain == valid_domain); |
16993
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
409 domain = valid_domain; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
410 auto_domain_done = true; # ensures only 1 round of do loop done |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
411 else |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
412 if (! auto_domain_done) |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
413 domain = find_valid_domain (X, Y, Z); |
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
414 endif |
17306
09543e9c8f40
Use explicit form of end (endif, endfor, etc.) in core m-files.
Rik <rik@octave.org>
parents:
17301
diff
changeset
|
415 endif |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
416 endif |
8046 | 417 endif |
7337 | 418 endif |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
419 until (domain_ok) |
7337 | 420 |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
421 ## Now, actually call the correct plot function with valid data and domain. |
17211
87ba70043bfc
Don't use ifelse in plot fcns to avoid unnecessary fcn evaluations.
Rik <rik@octave.org>
parents:
17167
diff
changeset
|
422 oldfig = []; |
17301
68bcac3c043a
Correct inversion accidentally introduced in cset 87ba70043bfc.
Rik <rik@octave.org>
parents:
17211
diff
changeset
|
423 if (! isempty (hax)) |
17211
87ba70043bfc
Don't use ifelse in plot fcns to avoid unnecessary fcn evaluations.
Rik <rik@octave.org>
parents:
17167
diff
changeset
|
424 oldfig = get (0, "currentfigure"); |
87ba70043bfc
Don't use ifelse in plot fcns to avoid unnecessary fcn evaluations.
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parents:
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diff
changeset
|
425 endif |
7337 | 426 unwind_protect |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
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parents:
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diff
changeset
|
427 hax = newplot (hax); |
7337 | 428 if (iscontour) |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
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parents:
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diff
changeset
|
429 [~, h] = feval (pltfunc, hax, X, Y, Z); |
8046 | 430 elseif (isplot && nargs == 2) |
16993
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parents:
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diff
changeset
|
431 h = zeros (length (XX), 1); |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
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diff
changeset
|
432 hold_state = get (hax, "nextplot"); |
8046 | 433 for i = 1 : length (XX) |
10549 | 434 if (i == 1) |
22308
b756cea4fdea
__ezplot__.m: Fix Matlab incompatibilities.
Rik <rik@octave.org>
parents:
21561
diff
changeset
|
435 h(1) = plot (hax, XX{1}, YY{1}); |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
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parents:
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diff
changeset
|
436 set (hax, "nextplot", "add"); |
22308
b756cea4fdea
__ezplot__.m: Fix Matlab incompatibilities.
Rik <rik@octave.org>
parents:
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diff
changeset
|
437 color = get (h(1), "color"); |
b756cea4fdea
__ezplot__.m: Fix Matlab incompatibilities.
Rik <rik@octave.org>
parents:
21561
diff
changeset
|
438 else |
b756cea4fdea
__ezplot__.m: Fix Matlab incompatibilities.
Rik <rik@octave.org>
parents:
21561
diff
changeset
|
439 h(i) = plot (hax, XX{i}, YY{i}, "color", color); |
10549 | 440 endif |
8046 | 441 endfor |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
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diff
changeset
|
442 set (hax, "nextplot", hold_state); |
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
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diff
changeset
|
443 axis (hax, domain); |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
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diff
changeset
|
444 elseif (isplot || ispolar) |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
445 h = feval (pltfunc, hax, X, Z); |
18718
a50d0d85dc73
Set axis equal for 2D parametric plots done with ezplot.
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
446 if (isplot) |
a50d0d85dc73
Set axis equal for 2D parametric plots done with ezplot.
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
447 if (! parametric) |
a50d0d85dc73
Set axis equal for 2D parametric plots done with ezplot.
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
448 axis (hax, domain); |
a50d0d85dc73
Set axis equal for 2D parametric plots done with ezplot.
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
449 else |
a50d0d85dc73
Set axis equal for 2D parametric plots done with ezplot.
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
450 axis ("equal"); |
a50d0d85dc73
Set axis equal for 2D parametric plots done with ezplot.
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
451 endif |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
452 endif |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
453 elseif (isplot3) |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
454 if (animate) |
26671
fec69a310833
__ezplot__.m: for ezplot3, draw "animate" plot just once.
Rik <rik@octave.org>
parents:
26379
diff
changeset
|
455 comet3 (hax, X, Y, Z); |
fec69a310833
__ezplot__.m: for ezplot3, draw "animate" plot just once.
Rik <rik@octave.org>
parents:
26379
diff
changeset
|
456 else |
fec69a310833
__ezplot__.m: for ezplot3, draw "animate" plot just once.
Rik <rik@octave.org>
parents:
26379
diff
changeset
|
457 h = feval (pltfunc, hax, X, Y, Z); |
8046 | 458 endif |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
459 grid (hax, "on"); |
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
460 zlabel (hax, "z"); |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
461 else # mesh and surf plots |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
462 h = feval (pltfunc, hax, X, Y, Z); |
16993
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
14868
diff
changeset
|
463 ## FIXME: surf, mesh should really do a better job of setting zlim |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
464 if (! parametric) |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
465 axis (hax, domain); |
16993
78f57b14535c
Overhaul ez* family of plot functions.
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parents:
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diff
changeset
|
466 endif |
7337 | 467 endif |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
468 xlabel (hax, xarg); |
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
469 ylabel (hax, yarg); |
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
470 title (hax, fstr); |
7337 | 471 unwind_protect_cleanup |
17054
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
472 if (! isempty (oldfig)) |
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
473 set (0, "currentfigure", oldfig); |
27b3a675ea6b
__ezplot__.m: Update to use new __plt_get_axis_arg__.
Rik <rik@octave.org>
parents:
16993
diff
changeset
|
474 endif |
7337 | 475 end_unwind_protect |
476 | |
477 endfunction | |
478 | |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
479 ## Eliminate bad data (complex values, infinities, singularities) |
7337 | 480 function x = __eliminate_sing__ (x) |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
481 if (iscomplex (x)) |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
482 x(imag (x) != 0) = NaN; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
483 endif |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
484 x(isinf (x)) = NaN; |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
485 ## High rates of curvature are treated as singularities |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
486 threshold = 0.2 * (max (x(:)) - min (x(:))); |
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
487 x(abs (del2 (x)) > threshold) = NaN; |
7337 | 488 endfunction |
16993
78f57b14535c
Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents:
14868
diff
changeset
|
489 |
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490 ## Find: 1) range of function where there are not NaN values, |
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491 ## 2) function is changing (not just flat surface) |
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492 function domain = find_valid_domain (X, Y, Z) |
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493 |
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494 if (isvector (Z)) |
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495 ## 2-D data for isplot |
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496 domain = [X(1) X(end)]; |
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497 |
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498 ## Guess a range which includes the "mass" of the data by using a |
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499 ## median-based approach. The center 3/4 of the data is used to |
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500 ## determine the range of the data. |
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501 ## This seems to be vaguely what Matlab does, but can't be sure. |
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502 XX = sort (Z(isfinite (Z))); |
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503 if (length (X) > 4) |
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504 irlo = XX(fix (1/8 * length (XX))); |
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505 irhi = XX(fix (7/8 * length (XX))); |
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506 d = irhi - irlo; |
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507 domain(3) = max (XX(1) - d/8, irlo - d); |
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508 domain(4) = min (XX(end) + d/8, irhi + d); |
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509 else |
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510 domain(3:4) = [XX(1), XX(end)]; |
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511 endif |
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512 |
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513 ## Handle exceptional case of constant function |
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514 if (domain(3) == domain(4)) |
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515 domain(3) -= 1; |
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516 domain(4) += 1; |
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517 endif |
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518 |
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519 else |
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520 ## 3-D data such as mesh, surf |
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521 Zfinite = ! isnan (Z); |
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522 Zrows = any (Zfinite, 2); |
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523 rmin = find (Zrows, 1, "first"); |
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524 rmax = find (Zrows, 1, "last"); |
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525 Zcols = any (Zfinite, 1); |
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526 cmin = find (Zcols, 1, "first"); |
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527 cmax = find (Zcols, 1, "last"); |
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528 |
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529 ## Handle nasty case of all NaNs |
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530 if (isempty (rmin)) |
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531 rmin = 1; rmax = rows (Z); |
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532 endif |
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533 if (isempty (cmin)) |
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534 cmin = 1; cmax = columns (Z); |
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535 endif |
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536 |
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537 if ( ! any (isnan (Z([rmin, rmax],:)(:))) |
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538 && ! any (isnan (Z(:, [cmin, cmax])(:)))) |
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539 ## Exclude surfaces along borders which are flat (gradient =~ 0). |
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540 ## Technically, this calculation might be better done with actual |
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541 ## deltaX, deltaY values. But, data is usually meshgridded |
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542 ## (constant spacing) so working with deltaROW#, deltaCOL# is fine. |
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543 [Zx, Zy] = gradient (Z(rmin:rmax, cmin:cmax)); |
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544 Zgrad = sqrt (Zx.^2 + Zy.^2); |
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545 slope = ((max (Z(:)) - min (Z(:))) |
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546 / sqrt ((rmax - rmin)^2 + (cmax - cmin)^2)); |
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547 slope /= 125; # threshold for discarding points. |
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548 Zrows = any (Zgrad > slope, 2); |
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549 rmin += find (Zrows, 1, "first") - 1; |
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550 rmax += find (Zrows, 1, "last") - rows (Zrows); |
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551 Zcols = any (Zgrad > slope, 1); |
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552 cmin += find (Zcols, 1, "first") - 1; |
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553 cmax += find (Zcols, 1, "last") - columns (Zcols); |
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554 endif |
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555 |
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556 domain = [X(1,cmin) X(1,cmax) Y(rmin,1) Y(rmax,1)]; |
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557 endif |
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558 |
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559 endfunction |