ex1.m

linear equation routines in matlab

function varargout = ex1(x)
%
% 
%
%  [F]     = ex1(x)  returns the function value in F
%  [F,Jac] = ex1(x)  returns the function value in F and 
%                    the Jacobian in Jac
%
%  Matthias Heinkenschloss
%  Department of Computational and Applied Mathematics
%  Rice University
%  March 9, 2004
%


% return the function value
varargout{1} = [ x(1)^2+x(2)^2-2;
                 exp(x(1)-1)+x(2)^3-2];
if( nargout > 1 )
  % return the Jacobian as the second argument
  varargout{2} = [ 2*x(1)                2*x(2);
                   exp(x(1)-1)           3*x(2)^2];
end