eegprep.firws

eegprep.firws(m, f, t=None, w=None)

Designs windowed sinc type I linear phase FIR filter.

Parameters

mint

Filter order (mandatory even).

ffloat or sequence of float

Vector or scalar of cutoff frequency/ies (-6 dB; pi rad / sample).

tstr, optional

‘high’ for highpass, ‘stop’ for bandstop filter (default low-/bandpass).

warray_like, optional

Vector of length m + 1 defining window (default hamming).

Returns

bnp.ndarray

Filter coefficients.

afloat

Always 1 (FIR filter).

Examples

fs = 500; cutoff = 0.5; df = 1; m = firwsord(‘hamming’, fs, df)[0] b, a = firws(m, cutoff / (fs / 2), ‘high’, scipy.signal.windows.hamming(m + 1))

Notes

Based on a MATLAB implementation by Andreas Widmann, University of Leipzig, 2005.

Parameters:

• m (int)

• f (float | Sequence[float])

• t (str | None)

• w (ndarray | None)

Return type:

Tuple[ndarray, float]