obsvss observable part

## Syntax

                slo = obsvss(sl)
                [Ao, Bo, Co] = obsvss(A, B, C)
                .. = obsvss(.., tol)

## Arguments

A,B,C,Ao,Bo,Co

  real matrices

sl,slo

  `syslin` lists

tol

  real (threshold) (default value `100*%eps`)

## Description

`slo=(Ao,Bo,Co)` is the observable part of linear system `sl=(A,B,C)` (`syslin` list)

`tol` threshold to test controllability (see `contr`); default value = `100*%eps`

## See also

- contr
- contrss
- obsv_mat
- obs_gram