65 lines
2.3 KiB
Matlab
65 lines
2.3 KiB
Matlab
function make_y_
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% function make_y_
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% forms oo_.endo_simul as guess values for deterministic simulations
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%
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% INPUTS
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% ...
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% OUTPUTS
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% ...
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% ALGORITHM
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% ...
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% SPECIAL REQUIREMENTS
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% none
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%
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% Copyright (C) 1996-2007 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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global M_ options_ oo_ ys0_
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options_ = set_default_option(options_,'periods',0);
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if isempty(oo_.steady_state)
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oo_.steady_state = zeros(M_.endo_nbr,1);
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end
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if isempty(oo_.endo_simul)
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if isempty(ys0_)
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oo_.endo_simul = [oo_.steady_state*ones(1,M_.maximum_lag+options_.periods+M_.maximum_lead)];
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else
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oo_.endo_simul = [ys0_*ones(1,M_.maximum_lag) oo_.steady_state*ones(1,options_.periods+M_.maximum_lead)];
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end
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elseif size(oo_.endo_simul,2) < M_.maximum_lag+M_.maximum_lead+options_.periods
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switch options_.deterministic_simulation_initialization
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case 0
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oo_.endo_simul = [oo_.endo_simul ...
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oo_.steady_state*ones(1,M_.maximum_lag+options_.periods+M_.maximum_lead-size(oo_.endo_simul,2),1)];
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case 1% A linear approximation is used to initiate the solution.
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oldopt = options_;
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options_.order = 1;
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dr = oo_.dr;
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dr.ys = oo_.steady_state;
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[dr,info,M_,options_,oo_]=dr1(dr,0,M_,options_,oo_);
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exogenous_variables = zeros(M_.maximum_lag+options_.periods+M_.maximum_lead-size(oo_.endo_simul,2)+1,0);
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y0 = oo_.endo_simul(:,1:M_.maximum_lag);
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oo_.endo_simul=simult_(y0,dr,exogenous_variables,1);
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options_ = oldopt;
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case 2% Homotopic mod: Leave endo_simul as it is.
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otherwise
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error('Unknown method.')
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end
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end |