120 lines
3.8 KiB
Matlab
120 lines
3.8 KiB
Matlab
function [ys,params,info] = evaluate_steady_state_file(ys_init,exo_ss,M_,options_,steady_state_checkflag)
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% function [ys,params1,info] = evaluate_steady_state_file(ys_init,exo_ss,M_,options_,steady_state_checkflag)
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% Evaluates steady state files
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%
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% INPUTS
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% ys_init vector initial values used to compute the steady
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% state
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% exo_ss vector exogenous steady state (incl. deterministic exogenous)
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% M_ struct model parameters
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% options_ struct options
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% steady_state_checkflag boolean indicator whether to check steady state returned
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% OUTPUTS
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% ys vector steady state
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% params1 vector model parameters possibly
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% modified by user steadystate
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% function
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% info 2x1 vector error codes
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%
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% SPECIAL REQUIREMENTS
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% none
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% Copyright © 2001-2023 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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params = M_.params;
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info = 0;
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fname = M_.fname;
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if options_.steadystate_flag == 1
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% old format
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h_steadystate = str2func([fname '_steadystate']);
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[ys,params1,check] = h_steadystate(ys_init, exo_ss,M_,options_);
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else % steadystate_flag == 2
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% new format
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h_steadystate = str2func([fname '.steadystate']);
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[ys,params1,check] = h_steadystate(ys_init, exo_ss, params);
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end
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if check
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info(1) = 19;
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info(2) = NaN;
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return
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end
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if M_.param_nbr > 0
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updated_params_flag = max(abs(params1-params)) > 1e-12 ...
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|| ~isequal(isnan(params1),isnan(params)); %checks whether numbers or NaN changed
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else
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updated_params_flag = 0;
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end
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h_set_auxiliary_variables = str2func([M_.fname '.set_auxiliary_variables']);
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if isnan(updated_params_flag) || (updated_params_flag && any(isnan(params(~isnan(params))-params1(~isnan(params))))) %checks if new NaNs were added
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info(1) = 24;
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info(2) = NaN;
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if M_.set_auxiliary_variables
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ys = h_set_auxiliary_variables(ys,exo_ss,params);
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end
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return
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end
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if updated_params_flag && ~isreal(params1)
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info(1) = 23;
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if ~isoctave
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info(2) = sum(imag(params).^2,'omitnan');
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else
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info(2) = nansum(imag(params).^2);
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end
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if M_.set_auxiliary_variables
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ys = h_set_auxiliary_variables(ys,exo_ss,params);
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end
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return
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end
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if updated_params_flag
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params = params1;
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end
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% adding values for auxiliary variables
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if ~isempty(M_.aux_vars) && ~options_.ramsey_policy
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if M_.set_auxiliary_variables
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ys = h_set_auxiliary_variables(ys,exo_ss,params);
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end
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end
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if steady_state_checkflag
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% Check whether the steady state obtained from the _steadystate file is a steady state.
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[residuals, check] = evaluate_static_model(ys, exo_ss, params, M_, options_);
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if check
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info(1) = 19;
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info(2) = check; % to be improved
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return
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end
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if max(abs(residuals)) > options_.solve_tolf
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info(1) = 19;
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info(2) = residuals'*residuals;
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return
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end
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if any(isnan(residuals))
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info(1) = 22;
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return
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end
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end
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