trfmod
======

poles and zeros display



Calling Sequence
~~~~~~~~~~~~~~~~


::

    [hm]=trfmod(h [,job])




Description
~~~~~~~~~~~

To visualize the pole-zero structure of a SISO transfer function `h` .

:job='p' visualization of polynomials (default)
: :job='f' visualization of natural frequencies and damping
:

Interactive simplification of `h`. `trfmod` opens a dialog window.



See Also
~~~~~~~~


+ `poly`_ polynomial definition
+ `simp`_ rational simplification


.. _simp: simp.html
.. _poly: poly.html