BUTTER_DENOMINATOR

Design-Time Functions > Functions: A - C > BUTTER_DENOMINATOR

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BUTTER_DENOMINATOR

Calculates the denominator coefficients for the Butterworth filter.

Format

BUTTER_DENOMINATOR (n, wn, fType, isDigital) returns ARRAY

Argument

n

An integer value indicating the order of the Butterworth filter.

wn

Array of values indicating the cutoff frequency that can have one or two elements.

fType

A text string. The filter type, can be one of {low, high, pass, stop}.

isDigital

A Boolean value.

Example

The following example illustrates the BUTTER_DENOMINATOR function:

Function

butter_denominator (6, {0.1951, 0.4081}, "pass", 1)

Result

{1.0000, -5.8240, 17.6909, -35.8509, 53.4731, -61.3642, 55.3780,0-39.5185, 22.1585, -9.5439, 3.0209, -0.6376, 0.0708}

Learn more about matrix/array functions.

n	An integer value indicating the order of the Butterworth filter.
wn	Array of values indicating the cutoff frequency that can have one or two elements.
fType	A text string. The filter type, can be one of {low, high, pass, stop}.
isDigital	A Boolean value.

Function	butter_denominator (6, {0.1951, 0.4081}, "pass", 1)
Result	{1.0000, -5.8240, 17.6909, -35.8509, 53.4731, -61.3642, 55.3780,0-39.5185, 22.1585, -9.5439, 3.0209, -0.6376, 0.0708}

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