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function [A,B] = ghx2transition(mm,iv,ic,aux)
% [A,B] = ghx2transition(mm,iv,ic,aux)
%
% Adapted by M. Ratto (from kalman_transition_matrix.m)
% Joint Research Centre, The European Commission,
% marco.ratto@ec.europa.eu
%
% Copyright (C) 2012-2017 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 <http://www.gnu.org/licenses/>.
global oo_ M_
[nr1, nc1] = size(mm);
ghx = mm(:, [1:(nc1-M_.exo_nbr)]);
ghu = mm(:, [(nc1-M_.exo_nbr+1):end] );
if nargin == 1
oo_.dr.ghx = ghx;
oo_.dr.ghu = ghu;
endo_nbr = M_.endo_nbr;
nstatic = M_.nstatic;
nspred = M_.nspred;
iv = (1:endo_nbr)';
ic = [ nstatic+(1:nspred) endo_nbr+(1:size(oo_.dr.ghx,2)-nspred) ]';
aux = oo_.dr.transition_auxiliary_variables;
k = find(aux(:,2) > nspred);
aux(:,2) = aux(:,2) + nstatic;
aux(k,2) = aux(k,2) + M_.nfwrd;
end
n_iv = length(iv);
n_ir1 = size(aux,1);
nr = n_iv + n_ir1;
A = zeros(nr,nr);
B = zeros(nr,M_.exo_nbr);
i_n_iv = 1:n_iv;
A(i_n_iv,ic) = ghx(iv,:);
if n_ir1 > 0
A(n_iv+1:end,:) = sparse(aux(:,1),aux(:,2),ones(n_ir1,1),n_ir1,nr);
end
B(i_n_iv,:) = ghu(iv,:);
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