I am using FREQZ as indicated by the lines of code below to obtain plots of magnitude and phase versus frequency:
b = [ 0.3125 0.3750 0.3125];a = 1;freqz(b,a)
I see a discontinuity in the phase plot. I was wondering if this is due to the phase angle not being unwrapped or if it is due to the choice of the filter coefficients themselves?
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