wfal=8;
n2=2;
n3=3;
n4=4;
n5=5;
[z2,p2,k2]=cheb2ap(n2,wfal);
[z3,p3,k3]=cheb2ap(n3,wfal);
[z4,p4,k4]=cheb2ap(n4,wfal);
[z5,p5,k5]=cheb2ap(n5,wfal);
[L2,M2]=zp2tf(z2,p2,k2);
[L3,M3]=zp2tf(z3,p3,k3);
[L4,M4]=zp2tf(z4,p4,k4);
[L5,M5]=zp2tf(z5,p5,k5);
H(n2)=tf(L2,M2)
H(n3)=tf(L3,M3)
H(n4)=tf(L4,M4)
H(n5)=tf(L5,M5)