dhnorm

dhnorm — discrete H-infinity norm

Calling sequence

hinfnorm=dhnorm(sl,[tol],[normax])

`sl`	: the state space system (`syslin` list) (discrete-time)
`tol`	: tolerance in bisection step, default value `0.01`
`normax`	: upper bound for the norm , default value is `1000`
`hinfnorm`	: the discrete infinity norm of `Sl`

produces the discrete-time infinity norm of a state-space system (the maximum over all frequencies on the unit circle of the maximum singular value).