111 lines
2.9 KiB
Matlab
111 lines
2.9 KiB
Matlab
function c = minus(a,b)
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%@info:
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%! @deftypefn {Function File} {@var{c} =} minus (@var{a},@var{b})
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%! @anchor{@dynDate/minus}
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%! @sp 1
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%! Overloads the minus (soustraction) operator for the Dynare dates class (@ref{dynDate}). Depending on the frequency, computes the number
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%! of years, quarters, months, weeks between two dates @var{a} and @var{b} (it is assumed that @var{a}>@var{B}).
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%! @sp 2
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%! @strong{Inputs}
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%! @sp 1
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%! @table @ @var
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%! @item a
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%! Dynare date object instantiated by @ref{dynDate}.
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%! @item b
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%! Dynare date object instantiated by @ref{dynDate}.
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%! @end table
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%! @sp 1
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%! @strong{Outputs}
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%! @sp 1
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%! @table @ @var
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%! @item c
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%! Integer scalar, the number of years, quarters, months or weeks between @var{a} and @var{B}.
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%! @end table
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%! @sp 2
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%! @strong{This function is called by:}
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%! @sp 2
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%! @strong{This function calls:}
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%! @ref{@@dynDate/eq},@ref{@@dynDate/lt}
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%!
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%! @end deftypefn
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%@eod:
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% Copyright (C) 2011-2013 Dynare Team
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%
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% This file is part of Dynare.
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%
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% Dynare is free software: you can redistribute it and/or modify
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% it under the terms of the GNU General Public License as published by
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% the Free Software Foundation, either version 3 of the License, or
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% (at your option) any later version.
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%
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% Dynare is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU General Public License
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% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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if ~( isa(a,'dynDate') && isa(b,'dynDate') )
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error(['dynDate::minus: Input arguments ' inputname(1) ' and ' inputname(2) ' must be dynDate objects!'])
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end
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if a.freq~=b.freq
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error(['dynDate::minus: ' inputname(1) ' and ' inputname(2) ' must have common frequency!'])
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end
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if a<b
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error(['dynDate::minus: ' inputname(1) ' must be posterior to ' inputname(2) '!'])
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end
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if a==b
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c = 0;
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return
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end
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switch a.freq
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case 1
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c = a.time(1)-b.time(1);
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case {4,12,52}
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c = a.time(2)-b.time(2) + (a.time(1)-b.time(1))*a.freq;
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otherwise
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error('dynDate::minus: Unknown frequency!')
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end
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%@test:1
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%$ % Define some dates
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%$ date_0_1 = 1950;
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%$ date_0_2 = 1950;
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%$ date_0_3 = 1940;
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%$ date_1_1 = '1950Q4';
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%$ date_1_2 = '1950Q1';
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%$ date_1_3 = '1940Q3';
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%$ date_2_1 = '2000M3';
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%$ date_2_2 = '1998M8';
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%$
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%$ % Call the tested routine.
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%$ d_0_1 = dynDate(date_0_1);
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%$ d_0_2 = dynDate(date_0_2);
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%$ d_0_3 = dynDate(date_0_3);
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%$ d_1_1 = dynDate(date_1_1);
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%$ d_1_2 = dynDate(date_1_2);
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%$ d_1_3 = dynDate(date_1_3);
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%$ d_2_1 = dynDate(date_2_1);
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%$ d_2_2 = dynDate(date_2_2);
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%$ e1 = d_0_1-d_0_2;
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%$ e2 = d_0_1-d_0_3;
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%$ e3 = d_1_1-d_1_2;
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%$ e4 = d_1_1-d_1_3;
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%$ e5 = d_2_1-d_2_2;
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%$
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%$ % Check the results.
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%$ t(1) = dyn_assert(e1,0);
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%$ t(2) = dyn_assert(e2,10);
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%$ t(3) = dyn_assert(e3,3);
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%$ t(4) = dyn_assert(e4,41);
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%$ t(4) = dyn_assert(e5,19);
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%$ T = all(t);
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%@eof:1
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