x | An array of the x-axis of the curve, usually time. |
y | An array of the y-axis of the curve. |
fType | A text string. The filter type, can be one of {low, high, pass, stop}. |
order | An integer indicating the order of the Butterworth filter. |
cutoff | An array. The cutoff frequency can have one or two elements. Here the cutoff frequency does not normalize. |
isAnalog | A Boolean value indicating whether it uses analog filtering. |
isTwoPass | A Boolean value indicating whether it uses zero-phase filtering. |