- The changeValueButtonPushed callback of changeValue button is triggered on button push
- It updates the value in the drop-down by accessing each drop-down menu
- https://www.mathworks.com/help/matlab/creating_guis/write-callbacks-for-gui-in-app-designer.html
- https://www.mathworks.com/help/matlab/matlab_env/save-load-and-delete-workspace-variables.html
- https://www.mathworks.com/help/matlab/ref/assignin.html