[Scilab-users] Why window() provides only symmetric weighting?

[Federico Miyara]

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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