2021-07-23 11:56:24 +02:00
|
|
|
function [fval, fjac] = wood(x)
|
|
|
|
|
|
|
|
% Copyright © 2021 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/>.
|
|
|
|
|
|
|
|
C3 = 200;
|
|
|
|
C4 = 20.2;
|
|
|
|
C5 = 19.8;
|
|
|
|
C6 = 180.0;
|
|
|
|
|
|
|
|
if nargin==1
|
|
|
|
fval = zeros(4, 1);
|
|
|
|
tmp1 = x(2)-x(1)*x(1);
|
|
|
|
tmp2 = x(4)-x(3)*x(3);
|
|
|
|
fval(1) = -C3*x(1)*tmp1-(1-x(1));
|
|
|
|
fval(2) = C3*tmp1+C4*(x(2)-1.0)+C5*(x(4)-1);
|
|
|
|
fval(3) = -C6*x(3)*tmp2-(1-x(3));
|
|
|
|
fval(4) = C6*tmp2+C4*(x(4)-1)+C5*(x(2)-1);
|
|
|
|
if nargout>1
|
|
|
|
fjac = zeros(4);
|
|
|
|
tmp1 = x(2)-3*x(1)*x(1);
|
|
|
|
tmp2 = x(4)-3*x(3)*x(3);
|
|
|
|
fjac(1,1) = -C3*tmp1+1;
|
|
|
|
fjac(1,2) = -C3*x(1);
|
|
|
|
fjac(2,1) = -2*C3*x(1);
|
|
|
|
fjac(2,2) = C3+C4;
|
|
|
|
fjac(2,4) = C5;
|
|
|
|
fjac(3,3) = -C6*tmp2+1;
|
|
|
|
fjac(3,4) = -C6*x(3);
|
|
|
|
fjac(4,2) = C5;
|
|
|
|
fjac(4,3) = -2*C6*x(3);
|
|
|
|
fjac(4,4) = C6+C4;
|
|
|
|
end
|
2021-07-23 19:41:10 +02:00
|
|
|
elseif ~nargin
|
2021-07-23 11:56:24 +02:00
|
|
|
if nargout==1
|
|
|
|
fval = [-3; -1; -3; -1];
|
|
|
|
else
|
|
|
|
error('One output is required for initialization mode.')
|
|
|
|
end
|
|
|
|
else
|
|
|
|
error('Wrong number of input arguments.')
|
|
|
|
end
|