You need 'Signal Processing Toolbox' to be able to use 'hanning' function. This function is not available in base MATLAB.
Letswave FFT Filtering Error
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Hello, I hope my message finds you well. I was trying to preprocess some data using the FFT Filter of Letswave 5. I keep getting these errors. I am no expert. I cant figure out what is wrong or how to fix it. Can anybody help?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/155759/image.png)
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