109 lines
4.2 KiB
Matlab
109 lines
4.2 KiB
Matlab
function str = subst_auxvar(var_index, aux_lead_lag, M_)
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% Given the index of an endogenous (possibly an auxiliary var), and a
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% lead/lag, creates a string of the form "x(lag)".
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% In the case of auxiliary vars for lags, replace by the original variable
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% name, and compute the lead/lag accordingly.
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% INPUTS
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% - aux_index [double] index of auxiliary variable
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% - aux_lead_lag [double] index for lead or lag
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% - M_ [struct] model structure
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%
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% OUTPUTS
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% - str [string] name of auxiliary
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% Copyright © 2001-2022 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 <https://www.gnu.org/licenses/>.
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if var_index <= M_.orig_endo_nbr
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str = sprintf('%s(%d)', M_.endo_names{var_index}, aux_lead_lag);
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return
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end
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aux_index=find([M_.aux_vars(:).endo_index]==var_index);
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if ~isempty(aux_index)
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switch M_.aux_vars(aux_index).type
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case 0
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% endo leads >= 2
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str = sprintf('%s(%d)', M_.endo_names{var_index}, aux_lead_lag);
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return
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case 1
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% endo lags >= 2
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orig_name = M_.endo_names{M_.aux_vars(aux_index).orig_index};
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case 2
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% exo leads >= 1
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str = sprintf('%s(+1)', M_.aux_vars(aux_index).orig_expr);
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return
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case 3
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% exo lags >= 1
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orig_name = M_.exo_names{M_.aux_vars(aux_index).orig_index};
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if M_.aux_vars(aux_index).orig_lead_lag==0
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str = sprintf('%s(%d)', orig_name, M_.aux_vars(aux_index).orig_lead_lag+aux_lead_lag-1);%orig_lead_lag is actually -1 due to being a lagged exogenous
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else
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str = sprintf('%s(%d)', orig_name, M_.aux_vars(aux_index).orig_lead_lag+aux_lead_lag);
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end
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return;
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case 4
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% Expectation operator
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str = sprintf('%s', M_.aux_vars(aux_index).orig_expr);
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return
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case 6
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% Ramsey's multipliers
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if ~isempty(aux_lead_lag)
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str = sprintf('%s(%d)', M_.endo_names{M_.aux_vars(aux_index).endo_index}, aux_lead_lag);
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else
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str = sprintf('%s', M_.endo_names{M_.aux_vars(aux_index).endo_index});
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end
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return
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case 7
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% Log-transformation of a variable
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str = sprintf('log(%s(%d))', M_.endo_names{M_.aux_vars(aux_index).orig_index}, aux_lead_lag);
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return;
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case 8
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% Diff operator
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str = sprintf('diff(%s)', M_.endo_names{M_.aux_vars(aux_index).orig_index});
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return
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case 9
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% Lagged diff
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lags = 0;
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j = aux_index;
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while M_.aux_vars(j).type==9
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j = M_.aux_vars(j).orig_index;
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lags = lags+1;
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end
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str = sprintf('diff(%s(-%u))', M_.endo_names{M_.aux_vars(j).orig_index}, lags);
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return
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case 10
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% Variable created when diff was taken of unary operator (log, exp)
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error('This type of auxiliary variable should not occur, please contact the developers.')
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case 11
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% Leaded diff
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leads = 0;
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j = aux_index;
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while M_.aux_vars(j).type==11
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j = M_.aux_vars(j).orig_index;
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lags = lags+1;
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end
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str = sprintf('diff(%s(%u))', M_.endo_names{M_.aux_vars(j).orig_index}, leads);
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return
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otherwise
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error('Invalid auxiliary type: %s', M_.endo_names{var_index})
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end
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str = sprintf('%s(%d)', orig_name, M_.aux_vars(aux_index).orig_lead_lag+aux_lead_lag);
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return
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else
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error('Could not find aux var: %s', M_.endo_names{var_index})
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end
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