Mercurial > octave
annotate scripts/time/datetick.m @ 10369:3516a245d607
datetick.m: Fix 'keepticks' bug, and untabify.
| author | Ben Abbott <bpabbott@mac.com> |
|---|---|
| date | Sat, 27 Feb 2010 23:04:09 -0500 |
| parents | c2f1cdb59821 |
| children | be55736a0783 |
| rev | line source |
|---|---|
| 9245 | 1 ## Copyright (C) 2008, 2009 David Bateman |
| 8112 | 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 -*- | |
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20 ## @deftypefn {Function File} {} datetick () |
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21 ## @deftypefnx {Function File} {} datetick (@var{form}) |
| 8112 | 22 ## @deftypefnx {Function File} {} datetick (@var{axis}, @var{form}) |
| 23 ## @deftypefnx {Function File} {} datetick (@dots{}, "keeplimits") | |
| 24 ## @deftypefnx {Function File} {} datetick (@dots{}, "keepticks") | |
| 25 ## @deftypefnx {Function File} {} datetick (@dots{ax}, @dots{}) | |
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26 ## Adds date formatted tick labels to an axis. The axis the apply the |
| 8112 | 27 ## ticks to is determined by @var{axis} that can take the values "x", |
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28 ## "y" or "z". The default value is "x". The formatting of the labels is |
| 8112 | 29 ## determined by the variable @var{form}, that can either be a string in |
| 30 ## the format needed by @code{dateform}, or a positive integer that can | |
| 31 ## be accepted by @code{datestr}. | |
| 32 ## @seealso{datenum, datestr} | |
| 33 ## @end deftypefn | |
| 34 | |
| 35 function datetick (varargin) | |
| 36 | |
| 37 [h, varargin, nargin] = __plt_get_axis_arg__ ("datetick", varargin{:}); | |
| 38 | |
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39 oldh = gca (); |
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40 unwind_protect |
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41 axes (h); |
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42 __datetick__ (varargin{:}); |
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43 unwind_protect_cleanup |
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44 axes (oldh); |
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45 end_unwind_protect |
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46 |
| 8112 | 47 endfunction |
| 48 | |
| 49 %!demo | |
| 50 %! yr = 1900:10:2000; | |
| 51 %! pop = [76.094, 92.407, 106.461, 123.077 131.954, 151.868, 179.979, ... | |
| 52 %! 203.984, 227.225, 249.623, 282.224]; | |
| 53 %! plot (datenum (yr, 1, 1), pop); | |
| 54 %! title ("US population (millions)"); | |
| 55 %! xlabel ("Year"); | |
| 56 %! datetick ("x", "YYYY"); | |
| 57 | |
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58 %!demo |
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59 %! yr =1988:2:2002; |
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60 %! yr =datenum(yr,1,1); |
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61 %! pr = [12.1 13.3 12.6 13.1 13.3 14.1 14.4 15.2]; |
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62 %! plot(yr,pr); |
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63 %! xlabel('year') |
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64 %! ylabel('average price') |
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65 %! ax=gca; |
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66 %! set(ax,'xtick',datenum(1990:5:2005,1,1)) |
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67 %! datetick(2,'keepticks') |
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68 %! set(ax,'ytick',12:16) |
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69 |
| 8112 | 70 function __datetick__ (varargin) |
| 71 | |
| 72 keeplimits = false; | |
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73 keepticks = false; |
| 8112 | 74 idx = []; |
| 75 for i = 1 : nargin | |
| 76 arg = varargin {i}; | |
| 77 if (ischar (arg)) | |
| 78 if (strcmpi (arg, "keeplimits")) | |
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79 keeplimits = true; |
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80 idx = [idx, i]; |
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81 elseif (strcmpi (arg, "keepticks")) |
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82 keepticks = true; |
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83 idx = [idx, i]; |
| 8112 | 84 endif |
| 85 endif | |
| 86 endfor | |
| 87 | |
| 88 varargin(idx) = []; | |
| 89 nargin = length (varargin); | |
| 90 form = []; | |
| 91 ax = "x"; | |
| 92 | |
| 93 if (nargin != 0) | |
| 94 arg = varargin{1}; | |
| 95 if (ischar(arg) && (strcmp (arg, "x") || strcmp (arg, "y") || | |
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96 strcmp (arg, "z"))) |
| 8112 | 97 ax = arg; |
| 98 if (nargin > 1) | |
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99 form = varargin{2}; |
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100 varargin(1:2) = []; |
| 8112 | 101 else |
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102 varargin(1) = []; |
| 8112 | 103 endif |
| 104 else | |
| 105 form = arg; | |
| 106 varargin(1) = []; | |
| 107 endif | |
| 108 endif | |
| 109 | |
| 110 ## Don't publish the existence of this variable for use with dateaxis | |
| 111 if (length (varargin) > 0) | |
| 112 startdate = varargin{1}; | |
| 113 else | |
| 114 startdate = []; | |
| 115 endif | |
| 116 | |
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117 if (! isempty (form)) |
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118 if (isnumeric (form)) |
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119 if (! isscalar (form) || floor (form) != form || form < 0) |
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120 error ("datetick: expecting form argument to be a positive integer"); |
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121 endif |
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122 elseif (! ischar (form)) |
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123 error ("datetick: expecting valid date format string"); |
| 8112 | 124 endif |
| 125 endif | |
| 126 | |
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127 if (keepticks) |
| 8112 | 128 ticks = get (gca (), strcat (ax, "tick")) |
| 129 else | |
| 130 ## Need to do our own axis tick position calculation as | |
| 131 ## year, etc, don't fallback on nice datenum values. | |
| 132 objs = findall (gca()); | |
| 133 xmax = NaN; | |
| 134 xmin = NaN; | |
| 135 for i = 1 : length (objs) | |
| 136 fld = get (objs (i)); | |
| 137 if (isfield (fld, strcat (ax, "data"))) | |
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138 xdata = getfield (fld, strcat (ax, "data"))(:); |
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139 xmin = min (xmin, min (xdata)); |
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140 xmax = max (xmax, max (xdata)); |
| 8112 | 141 endif |
| 142 endfor | |
| 143 | |
| 144 if (isnan (xmin) || isnan (xmax)) | |
| 145 xmin = 0; | |
| 146 xmax = 1; | |
| 147 elseif (xmin == xmax) | |
| 148 xmax = xmin + 1; | |
| 149 endif | |
| 150 | |
| 151 N = 3; | |
| 152 if (xmax - xmin < N) | |
| 153 ## Day scale or less | |
| 154 if (xmax - xmin < N / 24 / 60 / 60) | |
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155 scl = 1 / 24 / 60 / 60; |
| 8112 | 156 elseif (xmax - xmin < N / 24 / 6) |
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157 scl = 1 / 24 / 60; |
| 8112 | 158 else |
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159 scl = 1 / 24; |
| 8112 | 160 endif |
| 161 sep = __calc_tick_sep__ (xmin / scl , xmax / scl); | |
| 162 xmin = sep * floor (xmin / scl / sep); | |
| 163 xmax = sep * ceil (xmax / scl / sep); | |
| 164 nticks = (xmax - xmin) / sep + 1; | |
| 165 xmin *= scl; | |
| 166 xmax *= scl; | |
| 167 else | |
| 168 [ymin, mmin, dmin] = datevec (xmin); | |
| 169 [ymax, mmax, dmax] = datevec (xmax); | |
| 170 minyear = ymin + (mmin - 1) / 12 + (dmin - 1) / 12 / 30; | |
| 171 maxyear = ymax + (mmax - 1) / 12 + (dmax - 1) / 12 / 30; | |
| 172 minmonth = mmin + (dmin - 1) / 30; | |
| 173 maxmonth = (ymax - ymin) * 12 + mmax + (dmax - 1) / 30; | |
| 174 | |
| 175 if (maxmonth - minmonth < N) | |
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176 sep = __calc_tick_sep__ (xmin, xmax); |
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177 xmin = sep * floor (xmin / sep); |
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178 xmax = sep * ceil (xmax / sep); |
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179 nticks = (xmax - xmin) / sep + 1; |
| 8112 | 180 elseif (maxyear - minyear < N) |
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181 sep = __calc_tick_sep__ (minmonth , maxmonth); |
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182 xmin = datenum (ymin, sep * floor (minmonth / sep), 1); |
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183 xmax = datenum (ymin, sep * ceil (maxmonth / sep), 1); |
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184 nticks = ceil (maxmonth / sep) - floor (minmonth / sep) + 1; |
| 8112 | 185 else |
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186 sep = __calc_tick_sep__ (minyear , maxyear); |
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187 xmin = datenum (sep * floor (minyear / sep), 1, 1); |
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188 xmax = datenum (sep * ceil (maxyear / sep), 1, 1); |
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189 nticks = ceil (maxyear / sep) - floor (minyear / sep) + 1; |
| 8112 | 190 endif |
| 191 endif | |
| 192 ticks = xmin + [0 : nticks - 1] / (nticks - 1) * (xmax - xmin); | |
| 193 endif | |
| 194 | |
| 195 if (isempty (form)) | |
| 196 r = max(ticks) - min(ticks); | |
| 197 if r < 10/60/24 | |
| 198 ## minutes and seconds | |
| 199 form = 13; | |
| 200 elseif r < 2 | |
| 201 ## hours | |
| 202 form = 15; | |
| 203 elseif r < 15 | |
| 204 ## days | |
| 205 form = 8; | |
| 206 elseif r < 365 | |
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207 ## FIXME -- FORM should be 19 for European users who use dd/mm |
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208 ## instead of mm/dd. How can that be determined automatically? |
| 8112 | 209 ## months |
| 210 form = 6; | |
| 211 elseif r < 90*12 | |
| 212 ## quarters | |
| 213 form = 27; | |
| 214 else | |
| 215 ## years | |
| 216 form = 10; | |
| 217 endif | |
| 218 endif | |
| 219 | |
| 220 if (length (ticks) == 6) | |
| 221 ## Careful that its not treated as a datevec | |
| 222 if (! isempty (startdate)) | |
| 223 sticks = strvcat (datestr (ticks(1:end-1) - ticks(1) + startdate, form), | |
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224 datestr (ticks(end) - ticks(1) + startdate, form)); |
| 8112 | 225 else |
| 226 sticks = strvcat (datestr (ticks(1:end-1), form), | |
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227 datestr (ticks(end), form)); |
| 8112 | 228 endif |
| 229 else | |
| 230 if (! isempty (startdate)) | |
| 231 sticks = datestr (ticks - ticks(1) + startdate, form); | |
| 232 else | |
| 233 sticks = datestr (ticks, form); | |
| 234 endif | |
| 235 endif | |
| 236 | |
| 237 sticks = mat2cell (sticks, ones (rows (sticks), 1), columns (sticks)); | |
| 238 | |
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239 if (keepticks) |
| 8112 | 240 if (keeplimits) |
| 241 set (gca(), strcat (ax, "ticklabel"), sticks); | |
| 242 else | |
| 243 set (gca(), strcat (ax, "ticklabel"), sticks, strcat (ax, "lim"), | |
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244 [min(ticks), max(ticks)]); |
| 8112 | 245 endif |
| 246 else | |
| 247 if (keeplimits) | |
| 248 set (gca(), strcat (ax, "tick"), ticks, strcat (ax, "ticklabel"), sticks); | |
| 249 else | |
| 250 set (gca(), strcat (ax, "tick"), ticks, strcat (ax, "ticklabel"), sticks, | |
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251 strcat (ax, "lim"), [min(ticks), max(ticks)]); |
| 8112 | 252 endif |
| 253 endif | |
| 254 endfunction | |
| 255 | |
| 256 function [a, b] = __magform__ (x) | |
| 257 if (x == 0) | |
| 258 a = 0; | |
| 259 b = 0; | |
| 260 else | |
| 261 l = log10 (abs (x)); | |
| 262 r = fmod (l, 1); | |
| 263 a = 10 .^ r; | |
| 264 b = fix (l - r); | |
| 265 if (a < 1) | |
| 266 a *= 10; | |
| 267 b -= 1; | |
| 268 endif | |
| 269 if (x < 0) | |
| 270 a = -a; | |
| 271 endif | |
| 272 endif | |
| 273 endfunction | |
| 274 | |
| 275 ## A translation from Tom Holoryd's python code at | |
| 276 ## http://kurage.nimh.nih.gov/tomh/tics.py | |
| 277 function sep = __calc_tick_sep__ (lo, hi) | |
| 278 persistent sqrt_2 = sqrt (2.0); | |
| 279 persistent sqrt_10 = sqrt (10.0); | |
| 280 persistent sqrt_50 = sqrt (50.0); | |
| 281 | |
| 282 ticint = 5; | |
| 283 | |
| 284 ## Reference: Lewart, C. R., "Algorithms SCALE1, SCALE2, and | |
| 285 ## SCALE3 for Determination of Scales on Computer Generated | |
| 286 ## Plots", Communications of the ACM, 10 (1973), 639-640. | |
| 287 ## Also cited as ACM Algorithm 463. | |
| 288 | |
| 289 [a, b] = __magform__ ((hi - lo) / ticint); | |
| 290 | |
| 291 if (a < sqrt_2) | |
| 292 x = 1; | |
| 293 elseif (a < sqrt_10) | |
| 294 x = 2; | |
| 295 elseif (a < sqrt_50) | |
| 296 x = 5; | |
| 297 else | |
| 298 x = 10; | |
| 299 endif | |
| 300 sep = x * 10 .^ b; | |
| 301 endfunction | |
| 302 |