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1 ## Copyright (C) 2004 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{e} =} eomday (@var{y}, @var{m}) |
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21 ## Return the last day of the month @var{m} for the year @var{y}. |
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22 ## @seealso{datenum, datevec, weekday} |
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23 ## @end deftypefn |
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24 |
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25 ## Author: pkienzle <pkienzle@users.sf.net> |
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26 ## Created: 25 July 2004 |
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27 ## Adapted-By: William Poetra Yoga Hadisoeseno <williampoetra@gmail.com> |
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28 |
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29 function e = eomday (y, m) |
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30 |
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31 if (nargin != 2) |
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32 print_usage (); |
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33 endif |
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34 |
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35 eom = [31, 28, 31, 30 ,31, 30, 31, 31, 30, 31, 30, 31]; |
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36 e = eom(m); |
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37 e += (m == 2) & (mod (y, 4) == 0 & (mod (y, 100) != 0 | mod (y, 400) == 0)); |
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38 |
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39 endfunction |
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40 |
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41 # tests |
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42 %!assert(eomday([-4:4],2),[29,28,28,28,29,28,28,28,29]) |
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43 %!assert(eomday([-901,901],2),[28,28]) |
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44 %!assert(eomday([-100,100],2),[28,28]) |
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45 %!assert(eomday([-900,900],2),[28,28]) |
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46 %!assert(eomday([-400,400],2),[29,29]) |
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47 %!assert(eomday([-800,800],2),[29,29]) |
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48 %!assert(eomday(2001,1:12),[31,28,31,30,31,30,31,31,30,31,30,31]) |
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49 %!assert(eomday(1:3,1:3),[31,28,31]) |
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50 %!assert(eomday(1:2000,2)',datevec(datenum(1:2000,3,0))(:,3)) |
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51 %!assert([1900:1999](find(eomday(1900:1999,2*ones(1,100))==29)),[1904,1908,1912,1916,1920,1924,1928,1932,1936,1940,1944,1948,1952,1956,1960,1964,1968,1972,1976,1980,1984,1988,1992,1996]) |
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52 # demos |
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53 %!demo |
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54 %! y = 1900:1999; |
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55 %! e = eomday (y, 2 * ones (1, 100)); |
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56 %! y (find (e == 29)) |
