butter_pass_filter

hhpy.ds.butter_pass_filter(data: pandas.core.series.Series, cutoff: int, fs: int, order: int, btype: str = None, shift: bool = False)

Implementation of a highpass / lowpass filter using scipy.signal.butter

Parameters:

• data – pandas Series or 1d numpy Array
• cutoff – cutoff
• fs – critical frequencies
• order – order of the fit
• btype – The type of filter. Passed to scipy.signal.butter. Default is ‘lowpass’. One of {‘lowpass’, ‘highpass’, ‘bandpass’, ‘bandstop’}
• shift – whether to shift the data to start at 0

Returns:

1d numpy array containing the filtered data