annotate scripts/time/weekday.m @ 19593:446c46af4b42 stable

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scripts/statistics/distributions/unifrnd.m, scripts/statistics/distributions/wblrnd.m, scripts/statistics/models/module.mk, scripts/statistics/tests/kruskal_wallis_test.m, scripts/strings/base2dec.m, scripts/strings/deblank.m, scripts/strings/dec2base.m, scripts/strings/dec2bin.m, scripts/strings/dec2hex.m, scripts/strings/mat2str.m, scripts/strings/ostrsplit.m, scripts/strings/regexptranslate.m, scripts/strings/str2num.m, scripts/strings/strcat.m, scripts/strings/strjoin.m, scripts/strings/strsplit.m, scripts/strings/strtok.m, scripts/strings/strtrim.m, scripts/strings/strtrunc.m, scripts/strings/substr.m, scripts/testfun/__run_test_suite__.m, scripts/testfun/speed.m, scripts/testfun/test.m, scripts/time/asctime.m, scripts/time/datenum.m, scripts/time/datevec.m, scripts/time/weekday.m, src/Makefile.am, test/Makefile.am, test/build-bc-overload-tests.sh, test/build-sparse-tests.sh, test/jit.tst, test/line-continue.tst: Strip trailing whitespace.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 08:26:57 -0500
parents d63878346099
children 4197fc428c7d
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1 ## Copyright (C) 2000-2013 Paul Kienzle
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {[@var{n}, @var{s}] =} weekday (@var{d})
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21 ## @deftypefnx {Function File} {[@var{n}, @var{s}] =} weekday (@var{d}, @var{format})
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22 ## Return the day of the week as a number in @var{n} and as a string in @var{s}.
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23 ## The days of the week are numbered 1--7 with the first day being Sunday.
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24 ##
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25 ## @var{d} is a serial date number or a date string.
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26 ##
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27 ## If the string @var{format} is not present or is equal to @qcode{"short"} then
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28 ## @var{s} will contain the abbreviated name of the weekday. If @var{format}
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29 ## is @qcode{"long"} then @var{s} will contain the full name.
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30 ##
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31 ## Table of return values based on @var{format}:
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32 ##
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33 ## @multitable @columnfractions .06 .13 .16
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34 ## @headitem @var{n} @tab @qcode{"short"} @tab @qcode{"long"}
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35 ## @item 1 @tab Sun @tab Sunday
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36 ## @item 2 @tab Mon @tab Monday
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37 ## @item 3 @tab Tue @tab Tuesday
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38 ## @item 4 @tab Wed @tab Wednesday
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39 ## @item 5 @tab Thu @tab Thursday
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40 ## @item 6 @tab Fri @tab Friday
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41 ## @item 7 @tab Sat @tab Saturday
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42 ## @end multitable
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43 ##
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44 ## @seealso{eomday, is_leap_year, calendar, datenum, datevec}
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45 ## @end deftypefn
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46
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47 ## Author: pkienzle <pkienzle@users.sf.net>
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48 ## Created: 10 October 2001 (CVS)
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49 ## Adapted-By: William Poetra Yoga Hadisoeseno <williampoetra@gmail.com>
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50
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51 function [d, s] = weekday (d, format = "short")
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52
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53 if (nargin < 1 || nargin > 2)
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54 print_usage ();
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55 endif
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56
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57 if (iscellstr (d) || isnumeric (d))
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58 endsize = size (d);
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59 elseif (ischar (d))
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60 endsize = [rows(d), 1];
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61 endif
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62 if (ischar (d) || iscellstr (d))
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63 ## Make sure the date is numeric
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64 d = datenum (d);
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65 endif
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66 ## Find the offset from a known Sunday (2008-Jan-6), mod 7.
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67 d = floor (reshape (mod (d - 733048, 7), endsize));
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68 ## Make Saturdays a 7 and not a 0.
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69 d(!d) = 7;
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70
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71 if (isargout (2))
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72 if (strcmpi (format, "long"))
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73 names = {"Sunday" "Monday" "Tuesday" "Wednesday" "Thursday" ...
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74 "Friday" "Saturday"};
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75 else
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76 names = {"Sun" "Mon" "Tue" "Wed" "Thu" "Fri" "Sat"};
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77 endif
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78 s = strvcat (names(d));
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79 endif
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80
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81 endfunction
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82
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83
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84 %!demo
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85 %! ## Current weekday
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86 %! [n, s] = weekday (now ())
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87
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88 %!demo
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89 %! ## Weekday from datenum input
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90 %! [n, s] = weekday (728647)
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91
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92 %!demo
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93 %! ## Weekday of new millennium from datestr input
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94 %! [n, s] = weekday ("1-Jan-2000")
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95
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96 # tests
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97 %!assert (weekday (728647), 2)
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98 ## Test vector inputs for both directions
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99 %!assert (weekday ([728647 728648]), [2 3])
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100 %!assert (weekday ([728647;728648]), [2;3])
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101 ## Test a full week before our reference day
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102 %!assert (weekday ("19-Dec-1994"), 2)
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103 %!assert (weekday ("20-Dec-1994"), 3)
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104 %!assert (weekday ("21-Dec-1994"), 4)
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105 %!assert (weekday ("22-Dec-1994"), 5)
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106 %!assert (weekday ("23-Dec-1994"), 6)
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107 %!assert (weekday ("24-Dec-1994"), 7)
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108 %!assert (weekday ("25-Dec-1994"), 1)
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109 ## Test our reference day
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110 %!assert (weekday ("6-Jan-2008"), 1)
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111 ## Test a full week after our reference day
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112 %!assert (weekday ("1-Feb-2008"), 6)
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113 %!assert (weekday ("2-Feb-2008"), 7)
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114 %!assert (weekday ("3-Feb-2008"), 1)
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115 %!assert (weekday ("4-Feb-2008"), 2)
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116 %!assert (weekday ("5-Feb-2008"), 3)
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117 %!assert (weekday ("6-Feb-2008"), 4)
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118 %!assert (weekday ("7-Feb-2008"), 5)
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119 ## Test fractional dates
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120 %!assert (weekday (728647.1), 2)
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121 ## Test "long" option
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122 %!test
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123 %! [n, s] = weekday ("25-Dec-1994", "long");
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124 %! assert (n, 1);
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125 %! assert (s, "Sunday");
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126