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This turned out reasonably easy with the MATLink package. I used this set of code: Needs["MATLink`"] OpenMATLAB[] // Quiet MEvaluate["scope=serial('COM3');"]; MEvaluate["scope.Terminator='LF';"]; ...
I have a notebook that accomplishes the goal of going from a set of pictures of a beam with at different distances to the waist size assuming a roughly circular beam (as is the case for HeNe lasers). I have attached a PDF of the code....
Thanks! I did end up using the levelspec on the Map command.