The function you are trying to use here is part of the Signal Processing Toolbox, which is not available on Cody. However, you might find another way of implementing your idea in core MATLAB without that specific function.
Bottles of beer
letter yes yes & letter no no
Flip the main diagonal of a matrix
Is the Point in a Circle?
Greed is good - Simple partition P[n].
Make your own Test Suite (part 0)
Back to basics: adding comments to your code
Curve fitting (non-linear functions) & function handles
Comparison of floating-point numbers (doubles)
Comparison of floating-point numbers (singles)
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