matlab copying arrays

The easiest way to put it is I need to copy paste a 100 by 4 array from workspace into another 100 by 4 array in workspace!!

I created an array called Bat that is 100 by 4 and stored it in my workspace. I created another array called Bat option1, Bat option2,Bat option3, these are also 100 by 4. I created a GUI with a list box and now I am trying to code it so w.e you select is copy pasted in. But I can cannot find the command that will copy paste a whole array into another whole array. I have tried many commands like set(handles.listbox1, 'Bat',B4200_p23C), yourVariable = getappdata(handles.GUIHandle , 'yourVariable')