Effacer les filtres
Effacer les filtres

calling a function inside an app?

21 vues (au cours des 30 derniers jours)
Abdelrahman Taha
Abdelrahman Taha le 8 Jan 2020
Hi,
I am trying to understand how to call a function inside an app. So, I've created a simple app to get the sum of two numbers (a,b), and c is their sum. There's a pushbutton in the app whose function is to run this created functon outside the app and assign the outcome to the variable "c". However when I run the app, I get this error:
Unable to resolve the name app.a.
Error in su (line 2)
c = app.a + app.b;
This is the app code
properties (Access = public)
a % Description
b % Description
end
% Callbacks that handle component events
methods (Access = private)
% Value changed function: aEditField
function aEditFieldValueChanged(app, event)
app.a = app.aEditField.Value;
end
% Value changed function: bEditField
function bEditFieldValueChanged(app, event)
app.b = app.bEditField.Value;
end
% Button pushed function: Button
function ButtonPushed(app, event)
su;
app.cEditField.Value = c;
And this is the "su" function
function su
c = app.a + app.b;
end
Any help on why I get this error would be really appreciated.
Thanks

Réponse acceptée

J. Alex Lee
J. Alex Lee le 8 Jan 2020
Functions need inputs and outputs, so you will need to define the function su as
function out = su(app)
out = app.a+app.b
end
and inside your app
function ButtonPushed(app, event)
c = su(app);
app.cEditField.Value = c;
end
Now, as to whether this structure for the app and function is a good structure, that's a separate question.
  1 commentaire
Abdelrahman Taha
Abdelrahman Taha le 8 Jan 2020
Thanks for your help, it's working.

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Develop Apps Using App Designer dans Help Center et File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by