Effacer les filtres
Effacer les filtres

Custom warning message does not show when called within a function

42 vues (au cours des 30 derniers jours)
Pascal Weller
Pascal Weller le 4 Nov 2020
Commenté : Mario Malic le 4 Nov 2020
Hello,
I have got difficulties to get custom warning messages to pop up in MATLAB's console.
Scenario:
I start execution of the main script. At some point it calls a function that is coded in a seperate .m file. From this called function I would like to display a warning. It executes the line where the warning is called but nothing shows up in the console. How do I make this warning to show up? Thanks in advance for your help!
Dummy code:
Main script which is run:
clear;
fd = 'test.h5'
...
foo(fd);
...
Script for function foo():
function foo(fd)
if exist(fd,'file')
warning('''%s'' already exists. Overwriting it.',fd);
...
end
...
end
Btw: When I put a fprintf() or disp() or error() instead of the warning() it will show up in the console.
  3 commentaires
Pascal Weller
Pascal Weller le 4 Nov 2020
Thanks for the quick response. Your prediction was accurate.
>> warning;
All warnings have the state 'off'.
For anyone facing the same issue: Here is how to enable all warnings:
warning('on');
Steven Lord
Steven Lord le 4 Nov 2020
To probe the warning state:
warning query

Connectez-vous pour commenter.

Réponse acceptée

Luna
Luna le 4 Nov 2020
Modifié(e) : Luna le 4 Nov 2020
I agree with Walter, put that code on command window to get all warnings on:
warning all on;
Be sure that your if statement result is true. I recommend you to try this first:
function foo(fd)
if exist(fd,'file') == 2 % this is about exist function outputs. Check all the output states. if it is 2, that means file exists.
warning('''%s'' already exists. Overwriting it.',fd);
else
warning([fd, ' file does not exist.']);
end
end
Here is the link for exist function documentation:
  1 commentaire
Mario Malic
Mario Malic le 4 Nov 2020
It looks like that if expression is true when expression result is nonempty and contains only nonzero elements (logical or real numeric). Otherwise, the expression is false.

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Logical dans Help Center et File Exchange

Produits


Version

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by