nump=1; denp=[1 2];
P = tf(nump,denp,0,"plant input","plant output");

numk= [1 1]; denk = [1 0];
K = tf(numk, denk,0,"controller input","controller output");

FeedbackSys=feedback(P,K);

[num,den] = sys2tf(FeedbackSys)
[z,p]=sys2zp(FeedbackSys)
