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<font face="Courier New">Dear all,<br>
<br>
Just in case somebody finds this useful, I'm attaching a proposal
of a modified version of the function window() which includes
three new window functions: Blackman, Blackman-Harris and one out
of many different flat-top windows. It also allows a new argument,
opt, which can be either "per" for periodic option or "sym" or any
other value (or no value) for triggering the default symmetric
option.<br>
<br>
If there were interest, several other windows could be easily
added.<br>
<br>
Regards,<br>
<br>
Federico Miyara<br>
<br>
</font><br>
<div class="moz-cite-prefix">On 11/02/2021 04:12, Federico Miyara
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:c79312b9-0333-cc0e-f7ec-e6cbe0bcf844@fceia.unr.edu.ar">
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<font face="Courier New">Dear All,<br>
<br>
I wonder why windowing functions such as Hann, Hamming, etc.,
provided by window(), are only symmetric.<br>
<br>
When used for spectral analysis by subsequent use of fft(), the
periodic weighting is better than the symmetric one. The
symmetric window is mainly used in the design of FIR filters,
which I guess is a less frequent application than spectral
analysis.<br>
<br>
While it is true that an easy workaround to get a periodic
window of length n is, for instance<br>
<br>
w = </font><font face="Courier New">window("hn", n+1)(1:$-1); <br>
<br>
</font><font face="Courier New">a syntax such as this <br>
<br>
w = </font><font face="Courier New">window("hn", n, "per"); <br>
<br>
</font><font face="Courier New">would be easier.</font><font
face="Courier New"> Setting "sym" as the default option, no
backward compatibility issues would possibly arise.<br>
<br>
Regards,<br>
<br>
Federico Miyara<br>
</font>
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