bstap

bstap — hankel approximant

Calling sequence

[Q]=bstap(Sl)

`sl`	: linear system (`syslin` list) assumed continuous-time and anti-stable.
`Q`	: best stable approximation of `Sl` (`syslin` list).

Computes the best approximant Q of the linear system Sl

where

||T||

is the H-infinity norm of the Hankel operator associated with Sl.