Calling an app variable from it's string name

Sinem Erdogan

2021 12 28

0 个回答

3 次查看（30 天）

0 个投票

Hi, I am creating an app. In this app there is a checkbox for every car. There are 10 cars so I changed each box name as

app.CalculatePlmCheckBoxC1
app.CalculatePlmCheckBoxC2
...
    

And after this I want to assign the value of these boxes to certain variables. My code is below, but it doesn't work. and I can't solve the problem.

for numOfCars = 1:1:10
   calculatePlmApp = sprintf('app.CalculatePlmCheckBoxC%.Value',numOfCars);
   varValue = eval(calculatePlmApp);
   newName = sprintf('PlmC%d',numOfCars);
   assignin('base',newName,)varValue;
end

I would reallyappreciate it if you could help. Thank you already!

2 个评论
显示无隐藏无

Stephen23 2021-12-28

编辑：Stephen23 2021-12-28

在 MATLAB Online 中打开

Replace the anti-pattern, evil, obfuscated EVAL-based code with this simpler, efficient code:

F = sprintf('CalculatePlmCheckBoxC%d',numOfCars);
V = app.(F).Value

Note that magically making variables appear in other workspace is slow, complex, and inefficient.

Note that numbering variables like that makes processing your data more complex then if you used basic indexing.

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Is there a particular reason why you cannot process that data within the GUI ?

Sinem Erdogan 2021-12-28

Hi, yes this app is requested from me and I need to create an app. Thank you. There is a syntax that I can't break, they use it in my workplace. So I am kinda forced to work this way. I am new at app designing , I didn't know this type of calling variables.

请先登录，再进行评论。

请先登录，再回答此问题。

Follow Question