Butterworth filter

butter_bandpass_filter(x, flp, fhi, delt, order)

Butterworth filter design.

Parameters:

Name	Type	Description	Default
x	array_like	Signal to be filtered.	required
flp	float	Low-pass frequency.	required
fhi	float	High-pass frequency.	required
delt	int	Sampling interval.	required
order	int	Filter order.	required

Returns:

Name	Type	Description
double		Filtered signal.

Source code in dynfc/butter_bandpass_filter.py

def butter_bandpass_filter(x, flp, fhi, delt, order):
    """Butterworth filter design.

    Args:
        x (array_like): Signal to be filtered.
        flp (float): Low-pass frequency.
        fhi (float): High-pass frequency.
        delt (int): Sampling interval.
        order (int): Filter order.

    Returns:
        double: Filtered signal.
    """

    b, a = butter_design(flp, fhi, delt, order)
    y = filtfilt(b, a, x)

    return y