't_tide' function 'hanning' is not recognized

i have downloaded the 't_tide'.but when i use it,it told me 'hanning' is not recognized.what should i do??

[Stephen23]

Duplicate: https://www.mathworks.com/matlabcentral/answers/1876367-t_tide-how-to-fill-in-an-input-value-of-the-function