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CSP questions #7482

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@zhoudapeng1234

I don't understand some steps in the CSP calculation process, maybe someone could answer these questions:

  1. Why there is no "whitening transformation" in the fit process? It is different from the calculate steps in the references 《Optimizing Spatial Filters for Robust EEG Single-Trial Analysis》and 《Multiclass common spatial patterns and information theoretic feature extraction》.

  2. Why the eigen_values need to subtract 0.5 before being sorted?
    image

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