Scilab Function
Last update : April 1993

tf2ss - transfer to state-space

### Calling Sequence

  `sl=tf2ss(h [,tol])`

### Parameters

- `h`: rational matrix
- `tol`: may be the constant rtol or the 2 vector `[rtol atol]`
  - `rtol`:tolerance used when evaluating observability.
  - `atol`:absolute tolerance used when evaluating observability.
- `sl`: linear system (`syslin` list `sl=[A,B,C,D(s)]`)

### Description

transfer to state-space conversion:

`h=C*(s*eye()-A)^-1*B+D(s)`

### Examples

    s=poly(0,'s');
    H=[2/s,(s+1)/(s^2-5)];
    Sys=tf2ss(H)
    clean(ss2tf(Sys))

### See Also

`ss2tf`, `tf2des`, `des2tf`,