% function p2c_tst0 % needs to write in the workspace
% Feb 2016, J. Gaspar

A= [0 1; -1 -1];
% B= [0; 1];
% C= eye(2);
% D= [0; 0];

th= (0:45:360)*pi/180;
x0= [cos(th); sin(th)]; % collection of initial conditions

x1= A*x0; % compute local evolution (direction)

% plot the results
quiver(x0(1,:), x0(2,:), x1(1,:), x1(2,:))
axis equal
grid on