Name

nehari — Nehari approximant

Calling Sequence

[x]=nehari(R [,tol])

Parameters

R

linear system (syslin list)

x

linear system (syslin list)

tol

optional threshold

Description

[x]=nehari(R [,tol])returns the Nehari approximant of R.

R = linear system in state-space representation (syslin list).

R is strictly proper and - R~ is stable (i.e. R is anti stable).

 
|| R - X ||oo = min || R - Y ||oo
              Y in Hoo