select_features(dataX, dataY) returned zero columns.

[yqji2000]

I played with the experiments.ipynb with the hyperaktiv dataset and found that the following code returned zero columns in dataX
dataX = select_features(dataX, dataY)

I checked the shape of dataX and dataY before the above line of code and they were (85, 787) and (85,), respectively.

Is there anything wrong?