Hi Federico
Thank you for being open to finding the right word.
I think other members of our small group should also be open.
For me the plurality is not so important - but let's say it's the
wording used in all our educational books (in English) ... just dig into
any Signal Analysis book, etc., and what we're trying to name here is
exactly that, then it would be bad for Scilab to give it a different
name. Renaming something that is universally defined otherwise is an
uphill battle we cannot win.
Asymmetric window functions is new to me.I googled about window
functions and found (stumbled upon):
https://journals.sagepub.com/doi/pdf/10.1260/1748-3018.9.4.389
Conclusion: Asymmetric window functions have a purpose. When there's
asymmetric windows, then there must also be symmetric windows.
Here's a short list of symmetric window functions:
https://mathworld.wolfram.com/ApodizationFunction.html
Best regards,
Claus
On 12-04-2021 17:19, Federico Miyara wrote:
Samuel:
As a general concept, you are right ... but with nuances. The problem
is deciding when something is really wrong and when it is just a
question of opinion or personal preference. It is wrong to say the
Earth is flat, no matter how many people say it. But is it right or
wrong to call something just a conventional name?
For instance: Is it right to call the derivative of a function
"derivative"? Probably not, because "derivative" is a general concept
which seems to have no relationship with its meaning in math. Probably
in its origins it was more related to grammar than to math. But once
established for centuries, it wouldn't be convenient to change it on
the basis that it is "wrong".
By the same token, calling "periodic" a window function obtained from
periodic functions (cosines) whose period is equal to its length
doesn't seem intrinsically wrong to me. Calling it "closed" would be
worse since one immediately thinks either of a closed set, which is
not, or a closed curve, which isn't either.
But even if we found a better word, changing it would very likely
create an unnecessary cognitive dissonance to thousands or millions of
practitioners.
Anyway, if a much better and cristal-clear word (i.e., whose meaning
would be immediately obvious in its context) were found and gained
consensus, no problem to use it instead of "periodic". The important
thing in my proposal was to include in the window() function the
feature, not how we call it.
Regards,
Federico Miyara
On 12/04/2021 04:22, Dang Ngoc Chan, Christophe wrote:
Hello,
De : Federico Miyara
Envoyé : dimanche 11 avril 2021 02:08
Like it or not, I guess these keywords come from Matlab, and as Matlab
still seems to dominate the market, many people, including those
willing to quit Matlab (as I did several years ago), are quite used to
those keywords
I don't agree with this argument.
If a way of doing is wrong, then just keep on going because "everybody does so"
is just an argumentum ad populum
https://en.wikipedia.org/wiki/Argumentum_ad_populum
which is a fallacious argument.
Regards.
--
Christophe Dang Ngoc Chan
Mechanical calculation engineer
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