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