Why do I get the error "Undefined function or variable" using cwtfilterbank ?

I am receiving the following error message while using "cwtfilterbank". How can I resolve this issue? I am using MATLAB 2017b.

Answer 1

[Adam Danz]

The function was released in r2018a (you mentioned you're using r2017b).

https://www.mathworks.com/help/wavelet/ref/cwtfilterbank.html#mw_b8b0ddad-1703-45db-a219-febab76b6d1f_seealso

[Jhon Gray]

Thanks