denom
=====

denominator



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


::

    den=denom(r)




Arguments
~~~~~~~~~

:r rational or polynomial or constant matrix.
: :den polynomial matrix
:



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

`den=denom(r)` returns the denominator of a rational matrix.

Since rationals are internally represented as
`r=list(['r','num','den','dt'],num,den,[])`, `denom(r`) is the same as
`r(3)`, `r('den')` or `r.den`



See Also
~~~~~~~~


+ `numer`_ numerator


.. _numer: numer.html