h_norm — H-infinity norm
[hinfnorm [,frequency]]=h_norm(sl [,rerr])
the state space system (syslin list)
syslin
max. relative error, default value 1e-8
1e-8
the infinity norm of Sl
Sl
frequency at which maximum is achieved
produces the infinity norm of a state-space system (the maximum over all frequencies of the maximum singular value).