How do I use a value of a pop-up menu (in the GUI) in an if-loop?

Hello,

i'm writing an interface with the GUI for an oscilloscope. I want to use the value of a pop-up menu in an if-loop to determine the scale of my oscilloscope.

this is the code i wrote:

contents = get(handles.popupmenu1,'String'); 
energyLevel = contents(get(handles.popupmenu1,'Value'))
if strcmp(energyLevel, '100') | strcmp(energyLevel, '150')
    set(deviceObj.Channel(1), 'Scale', 0.2);   
    set(deviceObj.Channel(2), 'Scale', 0.2);
else set(deviceObj.Channel(1), 'Scale', 0.5);   
     set(deviceObj.Channel(2), 'Scale', 0.5);

Only it gives the following error: A nested function cannot be defined inside a control statement (if, while, for, switch or try-catch).

Be aware that in addition to this message, other messages might appear in the file. Such as, statement might not be aligned with its matching END and Parse error at END: usage might be invalid MATLAB syntax. When you remove the nested function definition from the control statement, these other messages might disappear

I am not familiar with this error. Can somebody help me?

Answer 1

[Ingrid]

are you not just missing an end or did you forgot to copy it?

energyLevel = str2double(contents(get(handles.popupmenu1,'String')))
if or(energyLevel==100,energyLevel==150)
    set(deviceObj.Channel(1), 'Scale', 0.2);   
    set(deviceObj.Channel(2), 'Scale', 0.2);
else 
     set(deviceObj.Channel(1), 'Scale', 0.5);   
     set(deviceObj.Channel(2), 'Scale', 0.5);
end

[Pien_]

I forgot to copy! Oops.

However, even with your adapted code, it still gives the same error. When I try to run it is also says: Function definition is misplaced or improperly nested.

[Ingrid]

I do not think the mistake is in this code but somewhere else in your file which is difficult to assess here