annotate scripts/time/now.m @ 20162:2645f9ef8c88 stable

doc: Update more docstrings to have one sentence summary as first line. Reviewed specfun, special-matrix, testfun, and time script directories. * scripts/specfun/expint.m, scripts/specfun/isprime.m, scripts/specfun/legendre.m, scripts/specfun/primes.m, scripts/specfun/reallog.m, scripts/specfun/realsqrt.m, scripts/special-matrix/gallery.m, scripts/special-matrix/hadamard.m, scripts/special-matrix/hankel.m, scripts/special-matrix/hilb.m, scripts/special-matrix/invhilb.m, scripts/special-matrix/magic.m, scripts/special-matrix/pascal.m, scripts/special-matrix/rosser.m, scripts/special-matrix/toeplitz.m, scripts/special-matrix/vander.m, scripts/special-matrix/wilkinson.m, scripts/testfun/assert.m, scripts/testfun/demo.m, scripts/testfun/example.m, scripts/testfun/fail.m, scripts/testfun/rundemos.m, scripts/testfun/runtests.m, scripts/testfun/speed.m, scripts/time/asctime.m, scripts/time/calendar.m, scripts/time/clock.m, scripts/time/ctime.m, scripts/time/datenum.m, scripts/time/datestr.m, scripts/time/datevec.m, scripts/time/etime.m, scripts/time/is_leap_year.m, scripts/time/now.m, scripts/time/weekday.m: Update more docstrings to have one sentence summary as first line.
author Rik <rik@octave.org>
date Sun, 03 May 2015 17:00:11 -0700
parents 4197fc428c7d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ## Copyright (C) 2000-2015 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} {t =} now ()
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21 ## Return the current local date/time as a serial day number
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22 ## (see @code{datenum}).
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23 ##
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24 ## The integral part, @code{floor (now)} corresponds to the number of days
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25 ## between today and Jan 1, 0000.
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26 ##
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27 ## The fractional part, @code{rem (now, 1)} corresponds to the current time.
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28 ## @seealso{clock, date, datenum}
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29 ## @end deftypefn
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30
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31 ## Author: pkienzle <pkienzle@users.sf.net>
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32 ## Created: 10 October 2001 (CVS)
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33 ## Adapted-By: William Poetra Yoga Hadisoeseno <williampoetra@gmail.com>
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34
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35 function t = now ()
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36
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37 if (nargin != 0)
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38 print_usage ();
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39 endif
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40
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41 t = datenum (clock ());
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42
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43 ## The following doesn't work (e.g., one hour off on 2005-10-04):
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44 ##
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45 ## seconds since 1970-1-1 corrected by seconds from GMT to local time
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46 ## divided by 86400 sec/day plus day num for 1970-1-1
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47 ## t = (time - mktime(gmtime(0)))/86400 + 719529;
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48 ##
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49 ## mktime (gmtime (0)) does indeed return the offset from Greenwich to the
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50 ## local time zone, but we need to account for daylight savings time
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51 ## changing by an hour the offset from CUT for part of the year.
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52
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53 endfunction
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56 %!assert (isnumeric (now ()))
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57 %!assert (now () > 0)
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58 %!assert (now () <= now ())
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60 %!error now (1)
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