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phasezd

Version:
    Last Modified: March 15, 2017

    Computes the phase response vector and the frequency vector of a filter. If you do not request an output, this function plots the unwrapped phase of the filter in the current plot window. phasezd(b) is equivalent to phasezd(b, [1], 512). phasezd(b, a) is equivalent to phasezd(b, a, 512).

    Syntax

    phasezd(b)
    phasezd(b, a)
    phasezd(b, a, w)
    phasezd(b, a, w, fs)
    phasezd(b, a, n)
    phasezd(b, a, n, 'whole')
    phasezd(b, a, n, fs)
    phasezd(b, a, n, 'whole', fs)
    h = phasezd(b, a, w)
    h = phasezd(b, a, w, fs)
    h = phasezd (b)
    h = phasezd (b, a)
    h = phasezd (b, a, n)
    h = phasezd (b, a, n, 'whole')
    h = phasezd (b, a, n, fs)
    h = phasezd (b, a, n, 'whole', fs)
    [h, f] = phasezd(b)
    [h, f] = phasezd(b, a)
    [h, f] = phasezd(b, a, n)
    [h, f] = phasezd(b, a, n, 'whole')
    [h, f] = phasezd(b, a, n, fs)
    [h, f] = phasezd(b, a, n, 'whole', fs)
    Legacy name: phasez

    Inputs

    b

    Numerator coefficients of the filter. b is a vector.

    a

    Denominator coefficients of the filter. a is a vector.

    Default: [1]

    w

    Frequency points at which you want to evaluate the phase response. If you do not specify w, MathScript evaluates the phase response at n points equally spaced around the upper half of the unit circle. w is a vector.

    fs

    Sampling frequency in Hz. fs is a scalar.

    n

    Number of frequency points. n is a positive integer. The default is 512.

    'whole'

    Directs MathScript to evaluate the phase response at n points equally spaced around the unit circle.

    Outputs

    h

    Phase response vector of the filter. h is a real vector.

    f

    Discrete frequency vector in radians/sample that corresponds to h. f is a vector.

    b = [1, 2];
    a = [-1, 1, 1, 3];
    n = 32;
    [H, F] = phasezd(b, a, n)

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA:

    This product does not support FPGA devices


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