Mercurial > hg > octave-nkf
annotate scripts/plot/appearance/datetick.m @ 20787:40ed9b46a800
new octave_value::string_value method with optional error message
* ov.h (octave_value::string_vector): New method.
ov-base.cc, ov-base.h (octave_base_value::string_vector):
New default method.
ov-str-mat.cc, ov-str-mat.h (octave_char_matrix_str::string_value):
New method.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 08 Oct 2015 16:43:22 -0400 |
| parents | 777f26aa8e3e |
| children |
| rev | line source |
|---|---|
|
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1 ## Copyright (C) 2008-2015 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") | |
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25 ## @deftypefnx {Function File} {} datetick (@var{hax}, @dots{}) |
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26 ## Add date formatted tick labels to an axis. |
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27 ## |
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28 ## The axis to apply the ticks to is determined by @var{axis} which can take |
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29 ## the values @qcode{"x"}, @qcode{"y"}, or @qcode{"z"}. The default value is |
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30 ## @qcode{"x"}. |
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31 ## |
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32 ## The formatting of the labels is determined by the variable @var{form}, which |
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33 ## can either be a string or positive integer that @code{datestr} accepts. |
| 8112 | 34 ## @seealso{datenum, datestr} |
| 35 ## @end deftypefn | |
| 36 | |
| 37 function datetick (varargin) | |
| 38 | |
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39 [hax, varargin, nargin] = __plt_get_axis_arg__ ("datetick", varargin{:}); |
| 8112 | 40 |
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41 oldfig = []; |
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42 if (! isempty (hax)) |
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43 oldfig = get (0, "currentfigure"); |
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44 endif |
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45 if (isempty (hax)) |
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46 hax = gca (); |
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47 endif |
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48 |
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49 unwind_protect |
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50 ## FIXME: This will bring the axes to the top of the stack. |
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51 ## This may not be desirable if there are multiple axes objects, |
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52 ## such as can occur with plotyy. |
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53 axes (hax); |
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54 __datetick__ (varargin{:}); |
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55 unwind_protect_cleanup |
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56 if (! isempty (oldfig)) |
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57 set (0, "currentfigure", oldfig); |
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58 endif |
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59 end_unwind_protect |
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60 |
| 8112 | 61 endfunction |
| 62 | |
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63 |
| 8112 | 64 %!demo |
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65 %! clf; |
| 8112 | 66 %! yr = 1900:10:2000; |
| 67 %! pop = [76.094, 92.407, 106.461, 123.077 131.954, 151.868, 179.979, ... | |
| 68 %! 203.984, 227.225, 249.623, 282.224]; | |
| 69 %! plot (datenum (yr, 1, 1), pop); | |
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70 %! title ('US population (millions)'); |
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71 %! xlabel ('Year'); |
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72 %! datetick ('x', 'YYYY'); |
| 8112 | 73 |
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74 %!demo |
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75 %! clf; |
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76 %! yr = 1988:2:2002; |
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77 %! yr = datenum (yr,1,1); |
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78 %! pr = [12.1 13.3 12.6 13.1 13.3 14.1 14.4 15.2]; |
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79 %! plot (yr, pr, '-o'); |
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80 %! xlabel ('year'); |
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81 %! ylabel ('average price'); |
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82 %! ax = gca; |
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83 %! set (ax, 'xtick', datenum (1990:5:2005,1,1)); |
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84 %! datetick (2, 'x', 'keepticks'); |
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85 %! set (ax, 'ytick', 12:16); |
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86 |
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87 ## Remove from test statistics. No real tests possible. |
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88 %!assert (1) |
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89 |
| 8112 | 90 function __datetick__ (varargin) |
| 91 | |
| 92 keeplimits = false; | |
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93 idx = strcmpi (varargin, "keeplimits"); |
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94 if (any (idx)) |
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95 keeplimits = true; |
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96 varargin = varargin(! idx); |
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97 endif |
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98 keepticks = false; |
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99 idx = strcmpi (varargin, "keepticks"); |
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100 if (any (idx)) |
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101 keepticks = true; |
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102 varargin = varargin(! idx); |
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103 endif |
| 8112 | 104 |
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105 nargin = numel (varargin); |
| 8112 | 106 form = []; |
| 107 ax = "x"; | |
| 108 | |
| 109 if (nargin != 0) | |
| 110 arg = varargin{1}; | |
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111 if (ischar (arg) && any (strcmpi (arg, {"x", "y", "z"}))) |
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112 ax = tolower (arg); |
| 8112 | 113 if (nargin > 1) |
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114 form = varargin{2}; |
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115 varargin(1:2) = []; |
| 8112 | 116 else |
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117 varargin(1) = []; |
| 8112 | 118 endif |
| 119 else | |
| 120 form = arg; | |
| 121 varargin(1) = []; | |
| 122 endif | |
| 123 endif | |
| 124 | |
| 125 ## Don't publish the existence of this variable for use with dateaxis | |
| 126 if (length (varargin) > 0) | |
| 127 startdate = varargin{1}; | |
| 128 else | |
| 129 startdate = []; | |
| 130 endif | |
| 131 | |
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132 if (! isempty (form)) |
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133 if (isnumeric (form)) |
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134 if (! isscalar (form) || form < 0 || form != fix (form)) |
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135 error ("datetick: expecting FORM argument to be a positive integer"); |
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136 endif |
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137 elseif (! ischar (form)) |
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138 error ("datetick: expecting valid date format string"); |
| 8112 | 139 endif |
| 140 endif | |
| 141 | |
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142 if (keepticks) |
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143 ticks = get (gca (), [ax "tick"]); |
| 8112 | 144 else |
| 145 ## Need to do our own axis tick position calculation as | |
| 146 ## year, etc, don't fallback on nice datenum values. | |
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147 objs = findall (gca ()); |
| 8112 | 148 xmax = NaN; |
| 149 xmin = NaN; | |
| 150 for i = 1 : length (objs) | |
| 151 fld = get (objs (i)); | |
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152 if (isfield (fld, [ax "data"])) |
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153 xdata = getfield (fld, [ax "data"])(:); |
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154 xmin = min (xmin, min (xdata)); |
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155 xmax = max (xmax, max (xdata)); |
| 8112 | 156 endif |
| 157 endfor | |
| 158 | |
| 159 if (isnan (xmin) || isnan (xmax)) | |
| 160 xmin = 0; | |
| 161 xmax = 1; | |
| 162 elseif (xmin == xmax) | |
| 163 xmax = xmin + 1; | |
| 164 endif | |
| 165 | |
| 166 N = 3; | |
| 167 if (xmax - xmin < N) | |
| 168 ## Day scale or less | |
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169 if (xmax - xmin < N / 24 / 60 / 60) |
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170 scl = 1 / 24 / 60 / 60; |
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171 elseif (xmax - xmin < N / 24 / 60) |
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172 scl = 1 / 24 / 60; |
| 8112 | 173 else |
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174 scl = 1 / 24; |
| 8112 | 175 endif |
| 176 sep = __calc_tick_sep__ (xmin / scl , xmax / scl); | |
| 177 xmin = sep * floor (xmin / scl / sep); | |
| 178 xmax = sep * ceil (xmax / scl / sep); | |
| 179 nticks = (xmax - xmin) / sep + 1; | |
| 180 xmin *= scl; | |
| 181 xmax *= scl; | |
| 182 else | |
| 183 [ymin, mmin, dmin] = datevec (xmin); | |
| 184 [ymax, mmax, dmax] = datevec (xmax); | |
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185 minyear = ymin + (mmin - 1) / 12 + (dmin - 1) / 12 / 30; |
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186 maxyear = ymax + (mmax - 1) / 12 + (dmax - 1) / 12 / 30; |
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187 minmonth = mmin + (dmin - 1) / 30; |
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188 maxmonth = (ymax - ymin) * 12 + mmax + (dmax - 1) / 30; |
| 8112 | 189 |
| 190 if (maxmonth - minmonth < N) | |
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191 sep = __calc_tick_sep__ (xmin, xmax); |
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192 xmin = sep * floor (xmin / sep); |
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193 xmax = sep * ceil (xmax / sep); |
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194 nticks = (xmax - xmin) / sep + 1; |
| 8112 | 195 elseif (maxyear - minyear < N) |
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196 sep = __calc_tick_sep__ (minmonth , maxmonth); |
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197 xmin = datenum (ymin, sep * floor (minmonth / sep), 1); |
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198 xmax = datenum (ymax, sep * ceil (maxmonth / sep), 1); |
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199 nticks = ceil (maxmonth / sep) - floor (minmonth / sep) + 1; |
| 8112 | 200 else |
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201 sep = __calc_tick_sep__ (minyear , maxyear); |
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202 xmin = datenum (sep * floor (minyear / sep), 1, 1); |
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203 xmax = datenum (sep * ceil (maxyear / sep), 1, 1); |
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204 nticks = ceil (maxyear / sep) - floor (minyear / sep) + 1; |
| 8112 | 205 endif |
| 206 endif | |
| 207 ticks = xmin + [0 : nticks - 1] / (nticks - 1) * (xmax - xmin); | |
| 208 endif | |
| 209 | |
| 210 if (isempty (form)) | |
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211 r = max (ticks) - min (ticks); |
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212 if (r < 10/60/24) |
| 8112 | 213 ## minutes and seconds |
| 214 form = 13; | |
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215 elseif (r < 2) |
| 8112 | 216 ## hours |
| 217 form = 15; | |
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218 elseif (r < 15) |
| 8112 | 219 ## days |
| 220 form = 8; | |
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221 elseif (r < 365) |
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222 ## FIXME: FORM should be 19 for European users who use dd/mm |
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223 ## instead of mm/dd. How can that be determined automatically? |
| 8112 | 224 ## months |
| 225 form = 6; | |
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226 elseif (r < 90*12) |
| 8112 | 227 ## quarters |
| 228 form = 27; | |
| 229 else | |
| 230 ## years | |
| 231 form = 10; | |
| 232 endif | |
| 233 endif | |
| 234 | |
| 235 if (length (ticks) == 6) | |
| 236 ## Careful that its not treated as a datevec | |
| 237 if (! isempty (startdate)) | |
| 238 sticks = strvcat (datestr (ticks(1:end-1) - ticks(1) + startdate, form), | |
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239 datestr (ticks(end) - ticks(1) + startdate, form)); |
| 8112 | 240 else |
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241 sticks = strvcat (datestr (ticks(1:end-1), form), |
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242 datestr (ticks(end), form)); |
| 8112 | 243 endif |
| 244 else | |
| 245 if (! isempty (startdate)) | |
| 246 sticks = datestr (ticks - ticks(1) + startdate, form); | |
| 247 else | |
| 248 sticks = datestr (ticks, form); | |
| 249 endif | |
| 250 endif | |
| 251 | |
| 252 sticks = mat2cell (sticks, ones (rows (sticks), 1), columns (sticks)); | |
| 253 | |
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254 if (keepticks) |
| 8112 | 255 if (keeplimits) |
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256 set (gca (), [ax "ticklabel"], sticks); |
| 8112 | 257 else |
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258 set (gca (), [ax "ticklabel"], sticks, |
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259 [ax "lim"], [min(ticks), max(ticks)]); |
| 8112 | 260 endif |
| 261 else | |
| 262 if (keeplimits) | |
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263 set (gca (), [ax "tick"], ticks, [ax "ticklabel"], sticks); |
| 8112 | 264 else |
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265 set (gca (), [ax "tick"], ticks, [ax "ticklabel"], sticks, |
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266 [ax "lim"], [min(ticks), max(ticks)]); |
| 8112 | 267 endif |
| 268 endif | |
| 269 endfunction | |
| 270 | |
| 271 function [a, b] = __magform__ (x) | |
| 272 if (x == 0) | |
| 273 a = 0; | |
| 274 b = 0; | |
| 275 else | |
| 276 l = log10 (abs (x)); | |
| 19310 | 277 r = rem (l, 1); |
| 8112 | 278 a = 10 .^ r; |
| 279 b = fix (l - r); | |
| 280 if (a < 1) | |
| 281 a *= 10; | |
| 282 b -= 1; | |
| 283 endif | |
| 284 if (x < 0) | |
| 285 a = -a; | |
| 286 endif | |
| 287 endif | |
| 288 endfunction | |
| 289 | |
| 290 ## A translation from Tom Holoryd's python code at | |
| 291 ## http://kurage.nimh.nih.gov/tomh/tics.py | |
| 292 function sep = __calc_tick_sep__ (lo, hi) | |
| 293 persistent sqrt_2 = sqrt (2.0); | |
| 294 persistent sqrt_10 = sqrt (10.0); | |
| 295 persistent sqrt_50 = sqrt (50.0); | |
| 296 | |
| 297 ticint = 5; | |
| 298 | |
| 299 ## Reference: Lewart, C. R., "Algorithms SCALE1, SCALE2, and | |
| 300 ## SCALE3 for Determination of Scales on Computer Generated | |
| 301 ## Plots", Communications of the ACM, 10 (1973), 639-640. | |
| 302 ## Also cited as ACM Algorithm 463. | |
| 303 | |
| 304 [a, b] = __magform__ ((hi - lo) / ticint); | |
| 305 | |
| 306 if (a < sqrt_2) | |
| 307 x = 1; | |
| 308 elseif (a < sqrt_10) | |
| 309 x = 2; | |
| 310 elseif (a < sqrt_50) | |
| 311 x = 5; | |
| 312 else | |
| 313 x = 10; | |
| 314 endif | |
| 315 sep = x * 10 .^ b; | |
| 316 endfunction | |
| 317 |