function x0=dynare_sensitivity()
% Part of the Sensitivity Analysis Toolbox for DYNARE
%
% Written by Marco Ratto, 2006
% Joint Research Centre, The European Commission,
% (http://eemc.jrc.ec.europa.eu/),
% marco.ratto@jrc.it 
%
% Disclaimer: This software is not subject to copyright protection and is in the public domain. 
% It is an experimental system. The Joint Research Centre of European Commission 
% assumes no responsibility whatsoever for its use by other parties
% and makes no guarantees, expressed or implied, about its quality, reliability, or any other
% characteristic. We would appreciate acknowledgement if the software is used.
% Reference:
% M. Ratto, Global Sensitivity Analysis for Macroeconomic models, MIMEO, 2006.
%

global M_ options_ oo_ bayestopt_

fname_ = M_.fname;
lgy_ = M_.endo_names;
x0=[];

options_ = set_default_option(options_,'opt_gsa',1);
options_gsa_ = options_.opt_gsa;

options_gsa_ = set_default_option(options_gsa_,'identification',0);
if options_gsa_.identification,
  options_gsa_.redform=0;
  options_gsa_ = set_default_option(options_gsa_,'morris',1);
end

% map stability
options_gsa_ = set_default_option(options_gsa_,'stab',1);
options_gsa_ = set_default_option(options_gsa_,'redform',0);
options_gsa_ = set_default_option(options_gsa_,'pprior',1);
options_gsa_ = set_default_option(options_gsa_,'prior_range',1);
options_gsa_ = set_default_option(options_gsa_,'ppost',0);
options_gsa_ = set_default_option(options_gsa_,'ilptau',1);
options_gsa_ = set_default_option(options_gsa_,'morris',0);
options_gsa_ = set_default_option(options_gsa_,'glue',0);
options_gsa_ = set_default_option(options_gsa_,'morris_nliv',6);
options_gsa_ = set_default_option(options_gsa_,'morris_ntra',20);
options_gsa_ = set_default_option(options_gsa_,'Nsam',2048);
options_gsa_ = set_default_option(options_gsa_,'load_redform',0);
options_gsa_ = set_default_option(options_gsa_,'load_rmse',0);
options_gsa_ = set_default_option(options_gsa_,'load_stab',0);
options_gsa_ = set_default_option(options_gsa_,'alpha2_stab',0.3);
options_gsa_ = set_default_option(options_gsa_,'ksstat',0.1);
%options_gsa_ = set_default_option(options_gsa_,'load_mh',0);

if options_gsa_.redform,
  options_gsa_.pprior=1;
  options_gsa_.ppost=0;
end

if options_gsa_.morris,
  if ~(exist('Sampling_Function_2','file')==6 | exist('Sampling_Function_2','file')==2),
    disp('Download pre-parsed mapping routines at:')
    disp('http://eemc.jrc.ec.europa.eu/softwareDYNARE-Dowload.htm')
    disp(' ' )
    error('Mapping routines missing!')

  end

  options_gsa_.pprior=1;
  options_gsa_.ppost=0;
  %options_gsa_.stab=1;
  options_gsa_.glue=0;
  options_gsa_.rmse=0;
  options_gsa_.load_rmse=0;
  options_gsa_.alpha2_stab=1;
  options_gsa_.ksstat=1;
  if options_gsa_.morris==2,
    options_gsa_ = set_default_option(options_gsa_,'Nsam',256);
    OutputDirectoryName = CheckPath('GSA/IDENTIF');
  else
    OutputDirectoryName = CheckPath('GSA/SCREEN');
  end
else
  OutputDirectoryName = CheckPath('GSA');
end

options_.opt_gsa = options_gsa_;

if (options_gsa_.load_stab | options_gsa_.load_rmse | options_gsa_.load_redform) ...
    & options_gsa_.pprior,
  filetoload=[OutputDirectoryName '\' fname_ '_prior.mat'];
  if isempty(ls(filetoload)),
    disp([filetoload,' not found!'])
    disp(['You asked to load a non existent analysis'])
    %options_gsa_.load_stab=0;
    return,
  else
  if isempty(strmatch('bkpprior',who('-file', filetoload),'exact')),
    disp('Warning! Missing prior info for saved sample') % trap for files previous 
    disp('The saved files are generated with previous version of GSA package') % trap for files previous 
  else
    load(filetoload,'bkpprior'),
    if any(bayestopt_.pshape~=bkpprior.pshape) | ...
        any(bayestopt_.p1~=bkpprior.p1) | ...
        any(bayestopt_.p2~=bkpprior.p2) | ...
        any(bayestopt_.p3(~isnan(bayestopt_.p3))~=bkpprior.p3(~isnan(bkpprior.p3))) | ...
        any(bayestopt_.p4(~isnan(bayestopt_.p4))~=bkpprior.p4(~isnan(bkpprior.p4))),
      disp('WARNING!')
      disp('The saved sample has different priors w.r.t. to current ones!!')
      disp('')
      disp('Press ENTER to continue')
      pause;
    end
  end
  end
end

if options_gsa_.stab & ~options_gsa_.ppost,
  x0 = stab_map_(OutputDirectoryName);
end

% reduced form
% redform_map(namendo, namlagendo, namexo, icomp, pprior, ilog, threshold)
options_gsa_ = set_default_option(options_gsa_,'logtrans_redform',0);
options_gsa_ = set_default_option(options_gsa_,'threshold_redform',[]);
options_gsa_ = set_default_option(options_gsa_,'ksstat_redform',0.1);
options_gsa_ = set_default_option(options_gsa_,'alpha2_redform',0.3);
options_gsa_ = set_default_option(options_gsa_,'namendo',[]);
options_gsa_ = set_default_option(options_gsa_,'namlagendo',[]);
options_gsa_ = set_default_option(options_gsa_,'namexo',[]);

options_.opt_gsa = options_gsa_;
if options_gsa_.redform & ~isempty(options_gsa_.namendo) ...
    & ~options_gsa_.ppost,
  if options_gsa_.morris,
    redform_screen(OutputDirectoryName);    
  else
    redform_map(OutputDirectoryName);
  end
end
% RMSE mapping
% function [rmse_MC, ixx] = filt_mc_(vvarvecm, loadSA, pfilt, alpha, alpha2)
options_gsa_ = set_default_option(options_gsa_,'rmse',0);
options_gsa_ = set_default_option(options_gsa_,'lik_only',0);
options_gsa_ = set_default_option(options_gsa_,'var_rmse',options_.varobs);
options_gsa_ = set_default_option(options_gsa_,'pfilt_rmse',0.1);
options_gsa_ = set_default_option(options_gsa_,'istart_rmse',options_.presample+1);
options_gsa_ = set_default_option(options_gsa_,'alpha_rmse',0.002);
options_gsa_ = set_default_option(options_gsa_,'alpha2_rmse',1);
options_.opt_gsa = options_gsa_;
if options_gsa_.rmse,
  if ~options_gsa_.ppost
  if options_gsa_.pprior
    a=whos('-file',[OutputDirectoryName,'\',fname_,'_prior'],'logpo2');
  else
    a=whos('-file',[OutputDirectoryName,'\',fname_,'_mc'],'logpo2');
  end
  if isempty(a),
    dynare_MC([],OutputDirectoryName);
    options_gsa_.load_rmse=0;
%   else
%     if options_gsa_.load_rmse==0,
%       disp('You already saved a MC filter/smoother analysis ')
%       disp('Do you want to overwrite ?')
%       pause;
%       if options_gsa_.pprior
%         delete([OutputDirectoryName,'\',fname_,'_prior_*.mat'])
%       else
%         delete([OutputDirectoryName,'\',fname_,'_mc_*.mat'])
%       end
%       dynare_MC([],OutputDirectoryName);
%       options_gsa_.load_rmse=0;
%     end    
    
  end
  end
  clear a;
  filt_mc_(OutputDirectoryName);
end


if options_gsa_.glue,
  dr_ = oo_.dr;
  if options_gsa_.ppost
    load([OutputDirectoryName,'\',fname_,'_post']);
    DirectoryName = CheckPath('metropolis');
  else
    if options_gsa_.pprior
      load([OutputDirectoryName,'\',fname_,'_prior']);
    else
      load([OutputDirectoryName,'\',fname_,'_mc']);
    end
  end
  if ~exist('x'),
    disp(['No RMSE analysis is available for current options'])
    disp(['No GLUE file prepared'])
    return,
  end
  nruns=size(x,1);
  gend = options_.nobs;
  rawdata = read_variables(options_.datafile,options_.varobs,[],options_.xls_sheet,options_.xls_range);
  rawdata = rawdata(options_.first_obs:options_.first_obs+gend-1,:);
  if options_.loglinear == 1
    rawdata = log(rawdata);
  end
  if options_.prefilter == 1
    %data = transpose(rawdata-ones(gend,1)*bayestopt_.mean_varobs);
    data = transpose(rawdata-ones(gend,1)*mean(rawdata,1));
  else
    data = transpose(rawdata);
  end
  
  Obs.data = data;
  Obs.time = [1:gend];
  Obs.num  = gend;
  for j=1:size(options_.varobs,1)
    Obs.name{j} = deblank(options_.varobs(j,:));
    vj=deblank(options_.varobs(j,:));
    
    jxj = strmatch(vj,lgy_(dr_.order_var,:),'exact');
    js = strmatch(vj,lgy_,'exact');
    if ~options_gsa_.ppost
%       y0=zeros(gend+1,nruns);
%       nb = size(stock_filter,3);
%       y0 = squeeze(stock_filter(:,jxj,:)) + ...
%         kron(stock_ys(js,:),ones(size(stock_filter,1),1));
%       Out(j).data = y0';
%       Out(j).time = [1:size(y0,1)];
      Out(j).data = jxj;
      Out(j).time = [pwd,'\',OutputDirectoryName];
    else
      Out(j).data = jxj;
      Out(j).time = [pwd,'\',DirectoryName];
    end
    Out(j).name = vj;
    Out(j).ini  = 'yes';
    Lik(j).name = ['rmse_',vj];
    Lik(j).ini  = 'yes';
    Lik(j).isam = 1;
    Lik(j).data = rmse_MC(:,j)';
    
    if ~options_gsa_.ppost
%       y0 = squeeze(stock_smooth(:,jxj,:)) + ...
%         kron(stock_ys(js,:),ones(size(stock_smooth,1),1));
%       Out1(j).name = vj;
%       Out1(j).ini  = 'yes';
%       Out1(j).time = [1:size(y0,1)];
%       Out1(j).data = y0';
      Out1=Out;
    else
      Out1=Out;
    end
    ismoo(j)=jxj;
    
  end
  jsmoo = size(options_.varobs,1);
  for j=1:M_.endo_nbr,
    if ~ismember(j,ismoo),
      jsmoo=jsmoo+1;
      vj=deblank(M_.endo_names(dr_.order_var(j),:));
      if ~options_gsa_.ppost        
%         y0 = squeeze(stock_smooth(:,j,:)) + ...
%           kron(stock_ys(j,:),ones(size(stock_smooth,1),1));
%         Out1(jsmoo).time = [1:size(y0,1)];
%         Out1(jsmoo).data = y0';
        Out1(jsmoo).data = j;
        Out1(jsmoo).time = [pwd,'\',OutputDirectoryName];
      else
        Out1(jsmoo).data = j;
        Out1(jsmoo).time = [pwd,'\',DirectoryName];
      end
      Out1(jsmoo).name = vj;
      Out1(jsmoo).ini  = 'yes';
    end
  end
  tit(M_.exo_names_orig_ord,:) = M_.exo_names;
  for j=1:M_.exo_nbr,
      Exo(j).name = deblank(tit(j,:));    
  end
  if ~options_gsa_.ppost
    Lik(size(options_.varobs,1)+1).name = 'logpo';
    Lik(size(options_.varobs,1)+1).ini  = 'yes';
    Lik(size(options_.varobs,1)+1).isam = 1;
    Lik(size(options_.varobs,1)+1).data = -logpo2;
  end
  Sam.name = bayestopt_.name;
  Sam.dim  = [size(x) 0];
  Sam.data = [x];
  
  Rem.id = 'Original';
  Rem.ind= [1:size(x,1)];
  
  Info.dynare=M_.fname;
  Info.order_var=dr_.order_var;
  Out=Out1;
  if options_gsa_.ppost
%     Info.dynare=M_.fname;
%     Info.order_var=dr_.order_var;
%     Out=Out1;
    Info.TypeofSample='post';
    save([OutputDirectoryName,'\',fname_,'_glue_post'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem','Info', 'Exo')
    %save([fname_,'_post_glue_smooth'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem','Info')
    
  else
    if options_gsa_.pprior
      Info.TypeofSample='prior';
      save([OutputDirectoryName,'\',fname_,'_glue_prior'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem','Info', 'Exo')
%       save([OutputDirectoryName,'\',fname_,'_prior_glue'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem')
%       Out=Out1;
%       save([OutputDirectoryName,'\',fname_,'_prior_glue_smooth'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem')
    else
      Info.TypeofSample='mc';
      save([OutputDirectoryName,'\',fname_,'_glue_mc'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem','Info', 'Exo')
%       save([OutputDirectoryName,'\',fname_,'_mc_glue'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem')
%       Out=Out1;
%       save([OutputDirectoryName,'\',fname_,'_mc_glue_smooth'], 'Out', 'Sam', 'Lik', 'Obs', 'Rem')
    end
  end
  
end