Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / financial-0.4.0 / lbusdate.m

diff --git a/octave_packages/financial-0.4.0/lbusdate.m b/octave_packages/financial-0.4.0/lbusdate.m
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+## Copyright (C) 2008 Bill Denney <bill@denney.ws>
+##
+## 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} {b =} lbusdate (year, month)
+## @deftypefnx {Function File} {b =} lbusdate (year, month, holiday)
+## @deftypefnx {Function File} {b =} lbusdate (year, month, holiday, weekend)
+##
+## Return the datenum of the last business day of the @var{year} and
+## @var{month}.  @var{holiday} is a vector of datenums that defines the
+## holidays observed (the holidays function is used if not given).
+## @var{weekend} defines the days of the week that should be considered
+## weekends; [1 0 0 0 0 0 1] (default) indicates that Sunday and
+## Saturday are holidays.
+##
+## If any of the optional inputs (@var{holiday}, @var{weekend}) are
+## empty, then the default is used.
+##
+## @seealso{holidays, fbusdate, isbusday, busdate}
+## @end deftypefn
+
+function rd = lbusdate (y, m, hol, wkend)
+
+  rd = eomdate (y, m);
+  if nargin < 3
+       hol = [];
+  end
+  if nargin < 4
+       wkend = [];
+  elseif nargin < 3 || nargin > 4
+       print_usage ();
+  endif
+
+  ## Test from the day after the end of the month so that the
+  ## last day of the month is captured.
+  rd = busdate (rd+1, -1, hol, wkend);
+
+endfunction
+
+## Tests
+## A normal day
+%!assert(lbusdate(2008,4), datenum(2008,4,30))
+## A weekend
+%!assert(lbusdate(2008,5), datenum(2008,5,30))