Mathieu functions toolbox

Comment -- May 14, 2011, 12:18:03 PM    

Hi,

Your module seems interesting. It builds and loads without problems: it is based only on 
macros.
I found a small problem in the example of the mathieuf function:

h=0;
  for j=-10:.1:10;
    h=h+1; 
    q(h)=j;
    a(:,h)=mathieuf(j,10);
  end 
  plot(q,a);

produces

!--error 15 
Sous-matrice incorrectement définie.

Most functions are documented which is excellent, but the ellipse function has 
undocumented input arguments. There are many examples in the help pages (except the 
ell2cart and mathieuS functions, which have no example).
The demos are impressive and seems to make use of the latest LaTeX features.

Very nice addition indeed !

Regards,

Michaël Baudin

Comment from robert coisson -- May 15, 2011, 12:19:09 PM    

Thank you for your remarks!

I tried the example you mention about mathieuf function, and it worked, but gave this
warning: Function sort is obsolete, please use gsort instead; this function will be
permanently removed in Scilab 5.3 
The version I used was 5.2.1, and you probably used 5.3, so "sort" did not exist
any more.
So it will be necessary to change "sort" into "gsort" in mathieuf.sci:
can you do this
change or should I send the file again? 

I shall look into the input arguments of the ellipse.sci function, and see if I can think
of an example of MathieuS function.
ell2cart.sci is an auxiliary function (and it is used in examples of modes with elliptical
boundary conditions), and in fact could be used also outside this context, when one has to
plot functions given in elliptical coordinates. Maybe I should send it also to "file
exchange"?

regards
roberto coisson

Comment from Nikolay Strelkov -- May 15, 2011, 12:58:31 PM    

Michael, thank you for feedback.

I also tried the example about mathieuf function. It's OK. But I get no warning. I tested 
it under Scilab 5.2.2, 5.3.0, 5.3.1 on Ubuntu 11.04 and Windows XP. What version and OS do

you use?

Hello, Roberto!
In mathieuf.sci we already have 'gsort' instead of 'sort' (see line 31). The comment in 
this line is incorrect ('sort' is deprecated, 'gsort' is alive). I.e. 5.3.0 there is no 
'sort', but there is 'gsort' instead.

Answer from robert coisson -- May 15, 2011, 03:04:51 PM    

Thank you Nikolay, 
I see that you already corrected the "sort" problem. Apparently I used the
previous version. 

Comment from robert coisson -- May 15, 2011, 02:59:29 PM    

Thank you for your remarks!

I tried the example you mention about mathieuf function, and it worked, but gave this
warning: Function sort is obsolete, please use gsort instead; this function will be
permanently removed in Scilab 5.3 
The version I used was 5.2.1, and you probably used 5.3, so "sort" did not exist
any more.
So it will be necessary to change "sort" into "gsort" in mathieuf.sci:
can you do this
change or should I send the file again? 

I shall look into the input arguments of the ellipse.sci function, and see if I can think
of an example of MathieuS function.
ell2cart.sci is an auxiliary function (and it is used in examples of modes with elliptical
boundary conditions), and in fact could be used also outside this context, when one has to
plot functions given in elliptical coordinates. Maybe I should send it also to "file
exchange"?

regards
roberto coisson

Comment from Nikolay Strelkov -- May 15, 2011, 06:27:03 PM    

Also tested under Scilab 5.3.2 on Ubuntu 11.04 and Windows XP with no error.

It seems that your use version of Scilab, which affected by Scilab bug 8669 (see http://bugzilla.scilab.org/show_bug.cgi?id=8669
for details) or something other.

Comment from Nikolay Strelkov -- May 16, 2011, 09:44:59 PM    

@Michael

After many trials a get the same error 15 on mathieuf example. It occurs if one runs 
examples from Mathieu Functions Toolbox help in a sequence: mathieuexp, mathieuf. These 
examples use the same variables 'a' and 'q'. 
Fixed in 1.0-2.

Thank you for discovering!