Location of the "end" statement of the main function in a m. file?

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Marek Gradzki
Marek Gradzki le 7 Août 2020
Commenté : Marek Gradzki le 7 Août 2020
Hello,
could someone write what is the difference between possible location of the "end" statement of the main function: before first local function vs end of a file? What is the difference?
For example: first vs. second case in this answer.
Thank you!
Marek

Réponse acceptée

Stephen23
Stephen23 le 7 Août 2020
Modifié(e) : Stephen23 le 7 Août 2020
"before first local function"
any functions defined after the main function are local functions:
"vs end of a file?"
any functions defined within the main function are nested functions:
These can be combined too, e.g.:
function mymain()
... code
function mynest()
... code
end % mynest()
end % mymain()
function mylocal()
... code
end % mylocal()
Nested functions have access to the parent function's workspace. Local functions do not.
  1 commentaire
Marek Gradzki
Marek Gradzki le 7 Août 2020
Ok, right, thanks! So I guess the main difference is about access to the variables defined in the main function.

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Plus de réponses (1)

Sudheer Bhimireddy
Sudheer Bhimireddy le 7 Août 2020
If you have 'end' at the end of a file, then your functions become 'Nested functions'. The variables created inside the function and their scope changes.
Read this, this and this MATLAB documentation.
Hope this helps.
  3 commentaires
Bruno Luong
Bruno Luong le 7 Août 2020
Modifié(e) : Bruno Luong le 7 Août 2020
function caller
a = 1;
function c = foo(d)
eval('b = d;'); % error "forbidden"
c = a + b;
end
function c = bar(d)
b = [];
eval('b = d;'); % OK
c = a + b;
end
fprintf('bar(2) = %g\n', bar(2));
fprintf('foo(2) = %g\n', foo(2)); % this won't run
end
Marek Gradzki
Marek Gradzki le 7 Août 2020
Ok, thank you!

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