pop-up menu (GUI,guide)

Question

Tahani Alajmi 2022-1-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1626355-pop-up-menu-gui-guide

评论： Tahani Alajmi 2022-1-10

采纳的回答： Walter Roberson

hi,

I have a school project, I need to use Matlab GUI to create a calculator and unit converter i used Guide

I have a problem in unit conversion code, I keep getting the error "Unknown function or 'main list' variable."

and nothing appears in the output screen.

I appreciate the help, thanks in advance for your time.

i'll attach the code

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Answer 1

Walter Roberson 2022-1-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1626355-pop-up-menu-gui-guide#answer_872170

在 MATLAB Online 中打开

Before

if mainList=='temperature'
    if innerList1=='Celsius'
       if innerList2=='Fahrenheit' 

insert

mainList_options = handles.mainList.String;
mainList_value = handles.mainList.Value;
innerList1_options = handles.innerList1.String;
innerList1_value = handles.innerList1.Value;
innerList2_options = handles.innerList2.String;
innerList2_value = handles.innerList2.Value;
%at this point you really should check to be sure that the _value
%variables are not empty: if they are then it means nothing has been
%selected in that list.
%check for empty here
%then
mainList = string( mainList_options{mainList_value} );
innerList1 = string( innerList1_options{innerList1_value} );
innerList2 = string( innerList2_options{innerList2_value} );