function ydot = lorenzeq(t,y)%LORENZEQ Equation of the Lorenz chaotic attractor.%	ydot = lorenzeq(t,y).%	The differential equation is written in almost linear form.%	Copyright (c) 1984-94 by The MathWorks, Inc.global SIGMA RHO BETAA = [ -BETA    0     y(2)           0  -SIGMA   SIGMA       -y(2)   RHO    -1  ];ydot = A*y;