ig1fun

 Copyright (C) 2011 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/>.

0001 function err = ig1fun(nu,mu2,sigma2)
0002 % Copyright (C) 2011 Dynare Team
0003 %
0004 % This file is part of Dynare.
0005 %
0006 % Dynare is free software: you can redistribute it and/or modify
0007 % it under the terms of the GNU General Public License as published by
0008 % the Free Software Foundation, either version 3 of the License, or
0009 % (at your option) any later version.
0010 %
0011 % Dynare is distributed in the hope that it will be useful,
0012 % but WITHOUT ANY WARRANTY; without even the implied warranty of
0013 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0014 % GNU General Public License for more details.
0015 %
0016 % You should have received a copy of the GNU General Public License
0017 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
0018 
0019 err = log(2*mu2) - log((sigma2+mu2)*(nu-2)) + 2*( gammaln(nu/2)-gammaln((nu-1)/2) );