MATLAB: MATLAB GUI Popup Menu

guiMATLABmatlab gui

So I'm trying to create a popup menu whose options depend on another selection made earlier in the GUI. I know one can simply add the options in a pop up menu via the Property Inspector, however since the options may vary depending on what the user will choose earlier I can't do that. Is there any way I can add the options the pop up menu will have depending on what the user chooser earlier?

Best Answer

Here's an example that I think is similar to what you're trying to do. It sounds like you're using GUIDE, in which case use the handles structure to access the handles of the appropriate uicontrol objects. But the key is using get to query the value of one menu that was chosen by the user, then using set to update the options in the other menu.
function objpick
figure;
uicontrol('units','normalized','position',[0.1,0.2,0.3,0.05],...
    'style','popup','string',{'Fruits','Vegetables','Marsupials'},...
    'value',1,'callback',@changetype);
hm2 = uicontrol('units','normalized','position',[0.6,0.2,0.3,0.05],...
    'style','popup','string',{''},'value',1);
      function changetype(hObj,~)
          switch get(hObj,'value')
              case 1
                  s = {'Apple','Banana','Pear'};
              case 2
                  s = {'Cabbage','Leek','Eggplant','Spinach'};
              case 3
                  s = {'Wombat','Platypus','Kangaroo'};
          end
          set(hm2,'string',s,'callback',@dosomething)
      end
end
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