[Scilab-users] Nested function definition

[Izabela Wójcik-Grząba]

No, it's not such a serious issue. They are connected with catenary 
cables selfweight.

Iza




W dniu 10.04.2019 17:44, Perrichon napisał(a):
> Are these functions coming from hydraulic simulator for power plants?
> 
> Best regards
> 
> 
> Before printing, think about ENVIRONMENTAL responsabity
> 
> -----Message d'origine-----
> De : users <users-bounces at lists.scilab.org> De la part de Izabela 
> Wójcik-Grzaba
> Envoyé : mercredi 10 avril 2019 17:31
> À : Users mailing list for Scilab <users at lists.scilab.org>
> Objet : Re: [Scilab-users] Nested function definition
> 
> Ok, sorry. It's my mistake connected with using math terms not 
> properly.
> Now I understand that nested function is more general term in Scilab
> help. The help example is similar to mine and this is the whole
> misunderstanding.
> I appreciate your comprehensive explanation.
> Now I am happy because the notation of my (mathematical) functions
> become simpler.
> 
> Kind regards,
> Iza
> 
> 
> 
> 
> 
> W dniu 10.04.2019 17:10, Samuel Gougeon napisał(a):
>> Izabela,
>> 
>> I have not clearly understood why you are speaking about "nested
>> functions" in your example.
>> A nested function is a function that is _defined_  in another one.
>> 
>> About the example in the function help page:
>> It is right, but with Scilab 6, it looks a bit outdated to me.
>> Indeed, let's consider the following example:
>> 
>> // Content of the File myTest.sci
>> function myTest()
>>    disp("myTest() is running")
>>    myNextFun()
>> endfunction
>> function myNextFun()
>>     disp("myNextFun() is running")
>> endfunction
>> // End of myTest.sci file
>> 
>> When building a library (say "myLib"), this file is compiled, and
>> 
>> 	* With Scilab 5 : both functions myTest() and myNextFun() are
>> registered in the library, and so ARE PUBLIC: Both can be called from
>> anywhere, noticeably from the top-level, the console.
>> The only way to make myNextFun() a private function known only by
>> myTest() is to define it IN myTest(), as a nested function.
>> 
>>  	* With Scilab 6: only myTest() is registered in myLib library, so is
>> public, and can be called from anywhere. In the opposite, myNextFun()
>> 
>>  	* is NOT registered in the library
>>  	* so, is unknown from the console,
>> 
>> 	* is shared and can be called only by other functions defined in the
>> same file.
>> 
>> This is a more powerful implementation for the functions privacy,
>> because then
>>  	* a private function (say myNextFun()) does no longer need to be
>> recompiled each time that myTest() is called.
>> 
>> 	* IMO, this makes the code clearer
>> 
>>  This change in Scilab 6 could be documented in the --> help function
>> page, in order to discourage true nested function. By the way, the
>> example in the help misses being indented.
>> 
>> However, out of libraries, nested functions can still be used in
>> scripts.sce or in files.sci that are just exec()uted, for the same
>> purpose: keeping nested functions private.
>> 
>> HTH
>> Regards
>> Samuel
>> 
>> Le 10/04/2019 à 16:04, Izabela Wójcik-Grząba a écrit :
>> 
>>> Ok, so why nested function in help is so complicated:
>>> 
>>> //nested functions definition
>>> function y=foo(x)
>>> a=sin(x)
>>> function y=sq(x), y=x^2,endfunction
>>> y=sq(a)+1
>>> endfunction
>>> 
>>> foo(%pi/3)
>>> 
>>> Couldn't it be formulated like below:
>>> 
>>> function y1=foo1(x)
>>> a=sin(x);
>>> y1=a^2+1;
>>> endfunction
>>> 
>>> foo1(%pi/3)
>>> 
>>> That's why I had problems with my functions and couldn't understand
>>> why it has to be so complicated.
>>> 
>>> Thank you once more.
>>> 
>>> Iza
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