In case the JuliaControl goup is looking for sample notebook ideas:
https://github.com/ma-laforge/InspectDR.jl/blob/master/notebook/3_pllstab.ipynb

Comments
- @ time of writing: Will need to 
Pkg.checkout("InspectDR") (master) to get the notebook running (not yet a tagged release). 
- Not yet making use of JuliaControl structures/functions (but that should be easy to change).
 
Feel free to modify the code to use your favorite plotting tool (though your tool might not respond as quickly as InspectDR at this point in time).