Hello,
You can set up your code into calculating your results, getting them all in a single matrix or a structure or a table and plot from there. Whatever you choose for your variable to be saved in, set it up as a property of the app so you can use it to plot the data easier from whereever in the app.
In your dropdown, define ItemsData, to be the vector 1:length(Items) in the App Designer. This way dropdown's value property will be numeric, corresponding to the ItemsData, and you can use it to index into the property(variable) with the results you want to plot.
