How do I plot Magnitude And Phase Response of a DT Signal

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Hafizuddin AS
Hafizuddin AS 2015 年 2 月 21 日
回答済み: Rick Rosson 2015 年 2 月 22 日
So I have a DT Sequence of [-2 5 11 4] how do i plot its magnitude and phase response?
t = 1:100;
y = [-2 5 11 4]
subplot(2,1,1)
stem(abs(y)), title('Amplitude plot')
subplot(2,1,2)
stem(angle(y)), title('Phase plot')
Will this work? Just using abs and angle? or is the formula wrong? Do I need to DTFT first?

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Rick Rosson
Rick Rosson 2015 年 2 月 22 日
doc fft

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