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function [prior,likelihood,C,posterior] = probability3(mu,sqrtP,prior,X,X_weights)
% Copyright © 2013-2017 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 <https://www.gnu.org/licenses/>.
[dim,nov] = size(X);
M = size(mu,2) ;
if nargout>1
likelihood = zeros(M,nov);
normfact = (2*pi)^(dim/2);
for k=1:M
XX = bsxfun(@minus,X,mu(:,k));
S = sqrtP(:,:,k);
foo = S \ XX;
likelihood(k,:) = exp(-0.5*sum(foo.*foo, 1))/abs((normfact*prod(diag(S))));
end
end
wlikelihood = bsxfun(@times,X_weights,likelihood) + 1e-99;
if nargout>2
C = prior*wlikelihood + 1e-99;
end
if nargout>3
posterior = bsxfun(@rdivide,bsxfun(@times,prior',wlikelihood),C) + 1e-99 ;
posterior = bsxfun(@rdivide,posterior,sum(posterior,1));
end
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