wfir
====

linear-phase FIR filters



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


::

    [wft,wfm,fr]=wfir(ftype,forder,cfreq,wtype,fpar)




Arguments
~~~~~~~~~

:ftype string : `'lp','hp','bp','sb'` (filter type)
: :forder Filter order (pos integer)(odd for `ftype='hp'` or `'sb'`)
: :cfreq 2-vector of cutoff frequencies ( `0<cfreq(1),cfreq(2)<.5`)
  only `cfreq(1)` is used when `ftype='lp'` or `'hp'`
: :wtype Window type ( `'re','tr','hm','hn','kr','ch'`)
: :fpar 2-vector of window parameters. Kaiser window `fpar(1)>0
  fpar(2)=0`. Chebyshev window `fpar(1)>0, fpar(2)<0` or `fpar(1)<0,
  0<fpar(2)<.5`
: :wft time domain filter coefficients
: :wfm frequency domain filter response on the grid fr
: :fr Frequency grid
:



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

Function which makes linear-phase, FIR low-pass, band-pass, high-pass,
and stop-band filters using the windowing technique. Works
interactively if called with no arguments.