
function xdot = fdot2D(xx)

global gamma F

x=xx(1);y=xx(2);
xdot=zeros(2,1);

% xdot(1)=x-y;
% xdot(2)=x^2-4;
%xdot(1)=y;
%xdot(2)=-gamma*y+1/x;
%xdot(1)=y;
%xdot(2)=-gamma*y-sin(x)+F;

xdot(1)=-x+y^2;
xdot(2)=y-x^2;

%xdot(1)=x*y;
%xdot(2)=x^2-y;
%xdot=(A+norm(xx)*B)*xx;


