dtsi Continuous time dynamical systems stable anti-stable decomposition

## Syntax

                [Ga, Gs, Gi] = dtsi(G)
                [Ga, Gs, Gi] = dtsi(G, tol)

## Arguments

G

  a continuous time linear system.

Ga

  a continuous time linear system antistable and strictly proper.

Gs

  a continuous time linear system stable and strictly proper.

Gi

  real matrix (or polynomial matrix for improper systems)

tol

  optional parameter for detecting stables poles. Default value: `100*%eps`

## Description

returns the stable-antistable decomposition of `G`:

`G= Ga + Gs + Gi`, `(Gi = G(oo))`

`G` can be given in state-space form or in transfer form.

`Ga` and `Gs` are returned in the same representation (transfer function or state-space) than `G`.

## See also

- syslin
- pbig
- psmall
- pfss

## Examples

    a=0.5;
    b=1;
    c=2;
    sl=syslin('c',a,b,c);
    dtsi(sl)

## History

5.4.0 `Sl` is now checked for continuous time linear dynamical system. This modification has been introduced by this commit