Error when using mne_features package

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Greeting all,

I am trying to extract features from the bnci-horizon 2020 dataset using user-defined feature functions under the MNE-features packages. The continuous signal was divided into a 20s epoch.
However, the package gives an error of 'RawArray' object has no attribute 'shape'

Appreciate if someone can point on the mistake that I had overlooked.

The error can be reproduced from the notebook, which is accessible from the link [1].

[1] https://github.com/balandongiv/Downsample/blob/master/Help_MneFeature.ipynb

Regards
Rodney

[UTP CONVOCATION 2019]<http://convocation.utp.edu.my/>

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This is expected behavior. "shape" is an attribute of NumPy arrays. RawArray is not a NumPy array, it is an MNE-Python Raw object that was originally created from a NumPy array (as opposed to Raw objects created from vendor-specific EEG or MEG data file formats). If you want the data dimensions, you can use a combination of the len() function and properties like raw.times and raw.ch_names, or you can extract the data samples using the get_data() method and use .shape on the result.