armax simulation (using rtitr)
[z]=narsimul(a,b,d,sig,u,[up,yp,ep]) [z]=narsimul(ar,u,[up,yp,ep])
ARMAX simulation. Same as arsimul but the method is different the simulation is made with rtitr
a=[1,-2.851,2.717,-0.865].*.eye(2,2) b=[0,1,1,1].*.[1;1]; d=[1,0.7,0.2].*.eye(2,2); sig=eye(2,2); ar=armac(a,b,d,2,1,sig) u=rand(1,10,'normal'); y=narsimul(ar,u)
