Re: How to use fir1 with 'scale'

[Paul Kienzle]

On Jul 21, 2004, at 6:59 AM, Per Persson wrote:

> On Jul 21, 2004, at 05:34, Joe Koski wrote:
> >  When I try
> >
> >   b = fir1(nfilt,0.01,'low','hamming','scale');
> >
> > I get an fir2 error "window must be of length n+1"
> >
> > Anybody got an idea? Thanks.
>
>
> Try: b = fir1(nfilt,0.01,'low', hamming(nfilt+1),'scale') instead.
> (nfilt is the number of delays, not coeffs)
>
> Don't know why passing just the window name doesn't work.

Because the author didn't think to implement it?  He will
accept patches though 8-)

If you are going to attempt this, you should check not only
for strings, but also for typeinfo(window)=="function handle"
(there is no 'isfunction' call, and 'exist' only accepts strings).

While you are at it, you should accept the arguments
        scale | noscale
        low | high | pass | stop | dc-0|dc-1
        hamming | hanning | gausswin | triang | boxcar | ...
in any order.

Paul Kienzle
address@hidden



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