56 lines
1.5 KiB
Matlab
56 lines
1.5 KiB
Matlab
function n = get_difference_order(var)
|
|
|
|
% Returns true iff endogenous variable `var` is a variable in difference.
|
|
%
|
|
% INPUTS
|
|
% - var [string, integer] Variable name or index in M_.endo_names.
|
|
%
|
|
% OUTPUTS
|
|
% - boo [logical] true/false.
|
|
|
|
% Copyright (C) 2018 Dynare Team
|
|
%
|
|
% This file is part of Dynare.
|
|
%
|
|
% Dynare 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.
|
|
%
|
|
% Dynare 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 Dynare. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
global M_
|
|
|
|
% Get index of the auxiliary
|
|
id = get_aux_variable_id(var);
|
|
|
|
% Set default difference order
|
|
n = 0;
|
|
|
|
% If var is not an auxiliary variable it cannot be a first difference.
|
|
if ~id, return, end
|
|
|
|
while id
|
|
if M_.aux_vars(id).type==8
|
|
% diff auxiliary variable.
|
|
n = n+1;
|
|
v = M_.aux_vars(id).orig_index;
|
|
if v<=M_.orig_endo_nbr
|
|
id = 0;
|
|
else
|
|
id = get_aux_variable_id(v);
|
|
end
|
|
elseif M_.aux_vars(id).type==9
|
|
% lagged diff auxiliary variable
|
|
v = M_.aux_vars(id).orig_index;
|
|
id = get_aux_variable_id(v);
|
|
else
|
|
break
|
|
end
|
|
end |