cont_mat controllability matrix

## Syntax

                Cc = cont_mat(A, B)
                Cc = cont_mat(sl)

## Arguments

a,b

  two real matrices of appropriate dimensions

sl

  linear system (`syslin` list)

## Description

`cont_mat` returns the controllability matrix of the pair `A,B` (resp. of the system `sl=[A,B,C,D]`).

    Cc=[B, AB, A^2 B,..., A^(n-1) B]

## See also

- ctr_gram
- contr
- canon
- st_ility