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function [info,description] = check_posterior_analysis_data(type,M_,options_)
% function [info,description] = check_posterior_analysis_data(type,M_,options_)
% Checks the status of posterior analysis and in particular if files need to be
% created or updated; called by posterior_analysis.m
%
% Inputs:
% type [string] name of the posterior moment considered
% M_ [structure] Dynare model structure
% options_ [structure] Dynare options structure
%
% Outputs:
% info [scalar] return code
% info = 1; % select_posterior_draws has to be called first.
% info = 2; % _posterior_draws files have to be updated.
% info = 3; % Ok! posterior draws files are up to date ;
% info = 4; % posterior draws have to be processed.
% info = 5; % posterior data files have to be updated.
% info = 6; % Ok (nothing to do ;-)
% description [string] Message corresponding to info
% Copyright © 2008-2025 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/>.
info = 0;
if nargout>1
description = '';
end
if ~issmc(options_)
[MetropolisFolder, info] = CheckPath('metropolis',M_.dname);
else
if ishssmc(options_)
[MetropolisFolder, info] = CheckPath('hssmc',M_.dname);
elseif isdsmh(options_)
[MetropolisFolder, info] = CheckPath('dsmh',M_.dname);
elseif isonline(options_)
[MetropolisFolder, info] = CheckPath('online',M_.dname);
elseif isdime(options_)
[MetropolisFolder, info] = CheckPath('dime',M_.dname);
else
error('check_posterior_analysis_data:: case should not happen. Please contact the developers')
end
end
% Get information about MCMC files.
if info
disp('check_posterior_analysis_data:: Can''t find any mcmc file!')
return
end
% Get information about _posterior_draws files.
drawsinfo = dir([ MetropolisFolder filesep M_.fname '_posterior_draws*.mat']);
if isempty(drawsinfo)
info = 1; % select_posterior_draws has to be called first.
if nargout>1
description = 'select_posterior_draws has to be called.';
end
return
else
number_of_last_posterior_draws_file = length(drawsinfo);
if ~issmc(options_)
mhname = get_name_of_the_last_mh_file(M_);
mhdate = get_date_of_a_file([MetropolisFolder filesep mhname]);
else
if ishssmc(options_)
% Load draws from the posterior distribution
pfiles = dir(sprintf('%s/hssmc/particles-*.mat', M_.dname));
mhdate = get_date_of_a_file(sprintf('%s/hssmc/particles-%u-%u.mat', M_.dname, length(pfiles), length(pfiles)));
elseif isdsmh(options_)
% Load draws from the posterior distribution
pfiles = dir(sprintf('%s/dsmh/particles-*.mat', M_.dname));
mhdate = get_date_of_a_file(sprintf('%s/dsmh/particles-%u-%u.mat', M_.dname, length(pfiles), length(pfiles)));
elseif isonline(options_)
% Load draws from the posterior distribution
pfiles = dir(sprintf('%s/online/parameters_particles_final.mat', M_.dname));
mhdate = get_date_of_a_file(sprintf('%s/online/parameters_particles_final.mat', M_.dname, length(pfiles), length(pfiles)));
elseif isdime(options_)
mhdate = get_date_of_a_file(sprintf('%s%s%s%schains.mat', M_.dname, filesep(), 'dime', filesep()));
end
end
pddate = get_date_of_a_file([ MetropolisFolder filesep M_.fname '_posterior_draws' int2str(number_of_last_posterior_draws_file) '.mat']);
if pddate<mhdate
info = 2; % _posterior_draws files have to be updated.
if nargout>1
description = 'posterior draws files have to be updated.';
end
return
else
info = 3; % Ok!
if nargout>1
description = 'posterior draws files are up to date.';
end
end
end
% Get information about posterior data files.
switch type
case 'variance'
generic_post_data_file_name = 'Posterior2ndOrderMoments';
case 'decomposition'
generic_post_data_file_name = 'PosteriorVarianceDecomposition';
case 'correlation'
generic_post_data_file_name = 'PosteriorCorrelations';
case 'conditional decomposition'
generic_post_data_file_name = 'PosteriorConditionalVarianceDecomposition';
otherwise
disp('This feature is not yet implemented!')
end
pdfinfo = dir([ MetropolisFolder filesep M_.fname '_' generic_post_data_file_name '*']);
if isempty(pdfinfo)
info = 4; % posterior draws have to be processed.
if nargout>1
description = 'posterior draws files have to be processed.';
end
return
else
number_of_the_last_post_data_file = length(pdfinfo);
name_of_the_last_post_data_file = ...
[ pwd filesep MetropolisFolder filesep ...
M_.fname '_' ...
generic_post_data_file_name ...
int2str(number_of_the_last_post_data_file) ...
'.mat' ];
pdfdate = get_date_of_a_file(name_of_the_last_post_data_file);
if pdfdate<pddate
info = 5; % posterior data files have to be updated.
if nargout>1
description = 'posterior data files have to be updated.';
end
else
info = 6; % Ok (nothing to do ;-)
if nargout>1
description = 'There is nothing to do';
end
end
end
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