Mux elements of multiple (same structure) busses together for scope (dynamic)

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MP 2017-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/343750-mux-elements-of-multiple-same-structure-busses-together-for-scope-dynamic

Hi, assume I have two busses with elements a and b each. I would like to scope these values in two subplots where in the upper one both a elements are plotted and in the bottom both b values. I want the structure to be in such a way, that if I were to add a third bus of the same structure, a third set of a and b elements is added to the same respective subplots automatically. Is there a way to achieve this?

Currently, I have to use bus selectors and muxes for each bus and element to get them back together in this fashion*. Arrays of buses look interesting, however I have not found a way to mux bus elements and feed that to a scope in some way without having to manually expand each mux for each bus element when I add a third bus.

*for each bus: bus selector to get all elements. Then Use mux on each element type of all busses to create one mux'ed signal per bus element type to be fed to a scope input.