Mercurial > forge
comparison main/time/weekday.m @ 0:6b33357c7561 octave-forge
Initial revision
| author | pkienzle |
|---|---|
| date | Wed, 10 Oct 2001 19:54:49 +0000 |
| parents | |
| children | 4d5773ef926a |
comparison
equal
deleted
inserted
replaced
| -1:000000000000 | 0:6b33357c7561 |
|---|---|
| 1 ## Copyright (C) 2000 Paul Kienzle | |
| 2 ## | |
| 3 ## This program is free software; you can redistribute it and/or modify | |
| 4 ## it under the terms of the GNU General Public License as published by | |
| 5 ## the Free Software Foundation; either version 2 of the License, or | |
| 6 ## (at your option) any later version. | |
| 7 ## | |
| 8 ## This program is distributed in the hope that it will be useful, | |
| 9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 ## GNU General Public License for more details. | |
| 12 ## | |
| 13 ## You should have received a copy of the GNU General Public License | |
| 14 ## along with this program; if not, write to the Free Software | |
| 15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 16 | |
| 17 ## -*- texinfo -*- | |
| 18 ## @deftypefn {Function File} {V =} datevec(date) | |
| 19 ## @deftypefnx {Function File} {[Y,M,D,h,m,s] =} datevec(date) | |
| 20 ## Breaks the number of days since Jan 1, 0000 into a year-month-day | |
| 21 ## hour-minute-second format. By this reckoning, Jan 1, 1970 is day | |
| 22 ## number 719529. The fractional portion of @code{date} corresponds to the | |
| 23 ## portion of the given day. If a single return value is requested, | |
| 24 ## then the components of the date are columns of the matrix @code{V}. | |
| 25 ## | |
| 26 ## Note: 32-bit architectures only handle times between Dec 14, 1901 | |
| 27 ## and Jan 19, 2038, with special handling for 0000-01-01. datenum | |
| 28 ## returns -1 in case of a range error. | |
| 29 ## | |
| 30 ## The parameter @code{P} is needed to convert date strings with 2 digit | |
| 31 ## years into dates with 4 digit years. 2 digit years are assumed to be | |
| 32 ## between @code{P} and @code{P+99}. If @code{P} is not given then the | |
| 33 ## current year - 50 is used, so that dates are centered on the present. | |
| 34 ## For birthdates, you would want @code{P} to be current year - 99. For | |
| 35 ## appointments, you would want @code{P} to be current year. | |
| 36 ## | |
| 37 ## Dates must be represented as mm/dd/yy or dd-mmm-yyyy. Times must | |
| 38 ## be hh:mm:ss or hh:mm:ss PM, with seconds optional. These correspond | |
| 39 ## to datestr format codes 0, 1, 2, 3, 13, 14, 15, 16. | |
| 40 ## | |
| 41 ## @seealso{date,clock,now,datestr,datenum,calendar,weekday} | |
| 42 ## @end deftypefn | |
| 43 | |
| 44 function [d,s] = weekday(date,P) | |
| 45 if (nargin < 1 || nargin > 2) | |
| 46 usage("d = weekday(date [, P])"); | |
| 47 endif | |
| 48 if isstr(date) | |
| 49 if nargin < 2, P = []; endif | |
| 50 date = datenum(date, P); | |
| 51 endif | |
| 52 d = rem(floor(date)+5,7)+1; | |
| 53 if nargout == 2, | |
| 54 global __day_names = ["Sun";"Mon";"Tue";"Wed";"Thu";"Fri";"Sat"]; | |
| 55 s = __day_names(d,:); | |
| 56 endif | |
| 57 endfunction |