MATLAB: Undefine ‘openExample’ function

example openexampleMATLAB

Hello All,
I want to using an example in Matworks Website following the instruction
But when I try it in Matlab Command window, I got error
Anyone can explain to me?
Thank you
P/S : I see that example display in Matlab R2018b.
I am using Matlab R2014b. Maybe this is problem?
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