Matlab app designer can't go further than the first dropdown value

Hi All

I have made an app with a dropdown and a push button. I should choose a value from dropdown and based on that the pushbutton will run a certain code pasted under it. let's say the dropdown values are 1,2,3

the problem is :

the app works fine If I choose the first value on dropdown menu and use the

if app.ConfigDropDown.Value == '1'
elsif app.ConfigDropDown.Value == '2'
elsif app.ConfigDropDown.Value == '3'
end

only if I choose the 1 , the code could run. otherwise it will give this error :

Matrix dimensions must agree.

Error in app/ExecuteButtonPushed (line 40)
if app.ConfigDropDown.Value == '2'
 
Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 309)
Error while evaluating Button PrivateButtonPushedFcn.

Answer 1

[Sean de Wolski]

if app.ConfigDropDown.Value == '1'

elseif app.ConfigDropDown.Value == '2'

elseif app.ConfigDropDown.Value == '3'
    
end

You're missing some e's.

[farzad]

sorry that mistake was made here , but in my code is as in your codes, and I have the error

[Sean de Wolski]

Put a break point on that line (click the little - to the left of the line) then click the button. Stop and inspect the variables and see what isn't as expected.

[farzad]

I don't know if putting a break in the app designer would really help since I can't see the output in the command prompt.

I only know that the app works if only the first drop down value is chosen, it does not work if I change it to other values

[Sean de Wolski]

You can see the value in the command prompt. Once you're stopped, type the value at the command prompt.