Thanks to Emily for the response on the SAS Simulation Module. Unfortunately, I felt that the answer was a mere copying of the SAS manual on the subject and not a comparison of the Switch and Selector blocks. It was difficult to ascertain that the Switch block can do these things whereas the Selector cannot, or vice versa. That is what I was searching for. This may be due to my lack of understanding of the explanation; I'll study the matter further. Again, please do not think I'm ungrateful for the help.
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