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[cc7e24]: financial / inst / year.m Maximize Restore History

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## Copyright (C) 2008 Bill Denney <bill@denney.ws>
## Copyright (C) 2013 CarnĂŤ Draug <carandraug@octave.org>
##
## 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 3 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, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} year (@var{date})
## @deftypefnx {Function File} {} year (@var{date}, @var{f})
## Return year of a date.
##
## For a given @var{date} in a serial date number or date string format,
## returns its year. The optional variable @var{f}, specifies the
## format string used to interpret date strings.
##
## @seealso{date, datevec, now, day, month}
## @end deftypefn
function t = year (varargin)
if (nargin < 1 || nargin > 2)
print_usage ();
elseif (nargin >= 2 && ! ischar (varargin{2}))
error ("year: F must be a string");
endif
t = datevec (varargin{:})(:,1);
endfunction
%!assert (year (523383), 1432);
%!assert (year ("12-02-34", "mm-dd-yy"), 1934);