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function [Q, A0, Aplus, Zeta] = load_flat_file(file_tag)
%function [Q, A0, Aplus, Zeta] = load_flat_file(file_tag)
% Loads file saved by save_draws option of ms_simulation.
%
% INPUTS
% file_tag: the file tag used with ms_simulation
%
% OUTPUTS
% Q: Q matrix
% A0: A0 matrix
% Aplus: A+ matrix
% Zeta: Zeta matrx
%
% SPECIAL REQUIREMENTS
% none
% Copyright © 2013 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/>.
Q = [];
A0 = [];
Aplus = [];
Zeta = [];
try
headerfid = fopen(['est_flat_header_' file_tag '.out'], 'r');
catch
error(['Can''t find est_flat_header_' file_tag '.out'])
end
headerfile=textscan(headerfid, '%s');
fclose(headerfid);
flatfile = dlmread(['est_flat_' file_tag '.out'], ' ');
headerfile = headerfile{:};
for i=1:length(headerfile)
line = char(headerfile{i});
indob = strfind(line, '[');
indcb = strfind(line, ']');
indop = strfind(line, '(');
indcp = strfind(line, ')');
indc = strfind(line, ',');
if isempty(indob)
name = line(1:indop-1);
dim3 = [];
else
name = line(1:indob-1);
dim3 = line(indob+1:indcb-1);
end
row = line(indop+1:indc-1);
col = line(indc+1:indcp-1);
if isempty(dim3)
eval([name '(' row ',' col ') = ' num2str(flatfile(i)) ';']);
else
eval([name '(' row ',' col ',' dim3 ') = ' num2str(flatfile(i)) ';']);
end
end
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