There are several software packages, not only Matlab, that call this
concept "periodic", for instance Octave, Scipy (from Python), DADiSP.
Regarding the last one, I've found an interesting reference:
https://www.dadisp.com/webhelp/mergedProjects/refman2/FncrefFK/FLATTOP.htm
Here, along with a description of the function, it mentions that
"periodic" can also be called "iso" since there is ISO Standard 18431-1
dealing with vibrations (Mechanical vibration and shock — Signal
processing Part 1: General introduction), which seemingly makes some
related normative prescriptions. Unfortunately the standard is too
expensive for me to even attempt to buy it, but perhaps some member of
this list has university access to these Standards.
I'm pretty sure that the ISO doesn't suggest that the name of this type
of window is "iso", but I'm in doubt whether they call it "periodic" or
they just introduce the recommended formula or algorithm.
Anyway, "iso" would be even more obscure than "periodic", if only
because there are literally thousands of ISO standards and most users
probably don't even suspect there is one covering this.
Regards,
Federico Miyara
On 12/04/2021 11:23, Claus Futtrup wrote:
Dear friends
I believe the initial question is related to giving more options to
the window functions, such that it can continue how it is today (aka
'symmetric') but also offer alternatives. If these additional options
makes sense, and can default such that they are not required (existing
code continues to work unaffected), and the additional options are
useful and meaningful in a mathematical sense, then I'm all for adding
these options.
When it comes to naming schemes, then Scilab is not required to
strictly follow the Matlab regime. We can choose what we find most
correct and concise. In some cases Scilab is 'better' than our
competition, which is a pleasure. It is true that some users come from
Matlab and sometimes we read Matlab code to convert its functionality
into Scilab - in these cases it works perfectly good for me to make a
Matlab-to-Scilab translation somewhere in the documentation.
Therefore, I hope we can have a good discussion about which name is
the most meaningful.
With kind regards,
Claus
On 12-04-2021 09:22, 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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