# butterworth - simple filters for noisy data
This crate implements digital Butterworth filters for time series data. Filters of arbitrary order can be created and applied to data. Lowpass, highpass, bandpass, and bandstop filters are supported.

Transfer function creation is primarily based on `scipy.signal.butter`. The `bidirectional` filter function is designed to match the behavior of MATLAB's `filtfilt` function. If the default signal padding behavior of used by SciPy's `filtfilt` is desired, the `bidirectional_with_padding` function can be used with a padding length of `3 * (filter.order() + 1)`.