119 lines
2.8 KiB
Matlab
119 lines
2.8 KiB
Matlab
function b = uminus(a)
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%@info:
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%! @deftypefn {Function File} {@var{b} =} uminus (@var{a})
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%! @anchor{@dynDate/uplus}
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%! @sp 1
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%! Overloads the uminus (unary soustraction) operator for the Dynare dates class (@ref{dynDate}). Decrement the date by one year, quarter,
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%! month or week depending on the frequency.
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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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%! @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 b
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%! Dynare date object instantiated by @ref{dynDate}.
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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}
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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')
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error(['dynDate::uminus: Input argument ' inputname(1) ' must be a dynDate object.'])
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end
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b = dynDate(a);
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switch b.freq
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case 1
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b.time(1) = b.time(1)-1;
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case 4
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if b.time(2)==1
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b.time(1) = b.time(1)-1;
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b.time(2) = 4;
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else
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b.time(2) = b.time(2)-1;
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end
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case 12
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if b.time(2)==1
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b.time(1) = b.time(1)-1;
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b.time(2) = 12;
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else
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b.time(2) = b.time(2)-1;
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end
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case 52
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if b.time(2)==1
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b.time(1) = b.time(1)-1;
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b.time(2) = 52;
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else
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b.time(2) = b.time(2)-1;
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end
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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_1 = '1950Q1';
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%$ date_2 = '1950Q4';
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%$ date_3 = '1950M1';
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%$ date_4 = '1950M12';
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%$ date_5 = '1950w1';
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%$ date_6 = '1950W52';
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%$ date_7 = 2000;
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%$
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%$ % Call the tested routine.
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%$ d1 = dynDate(date_1);
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%$ d2 = dynDate(date_2);
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%$ d3 = dynDate(date_3);
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%$ d4 = dynDate(date_4);
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%$ d5 = dynDate(date_5);
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%$ d6 = dynDate(date_6);
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%$ d7 = dynDate(date_7);
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%$ e1 = -d1;
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%$ e2 = -d2;
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%$ e3 = -d3;
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%$ e4 = -d4;
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%$ e5 = -d5;
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%$ e6 = -d6;
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%$ e7 = -d7;
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%$
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%$ % Check the results.
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%$ t(1) = dyn_assert(e1.time,[1949 4]);
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%$ t(2) = dyn_assert(e2.time,[1950 3]);
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%$ t(3) = dyn_assert(e3.time,[1949 12]);
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%$ t(4) = dyn_assert(e4.time,[1950 11]);
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%$ t(5) = dyn_assert(e5.time,[1949 52]);
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%$ t(6) = dyn_assert(e6.time,[1950 51]);
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%$ t(7) = dyn_assert(e7.time,[1999 1]);
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%$ T = all(t);
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%@eof:1
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