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.
Determine if a Given Number is a Triangle Number
Solve the Sudoku Row
Back to basics 20 - singleton dimensions
Create a square matrix of multiples
Back to basics: adding comments to your code
Code breaker, Part I: Operation Phoenix
Anyone for tennis? Your chances of winning a (standard) game
Guess the number I'm thinking of
"Percentages may not total 100 due to rounding"
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