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i want to plot freq response of FIR filter

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Sliman Izz
Sliman Izz 2023-2-9
评论： Mathieu NOE 2023-2-9
the filter is :
w = linspace(0,pi);
b0=1
b1=-2
b2=4
b=b0*conv(b1,b2)
freqz(b,w)
it gives me an error

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回答（1 个）

Mathieu NOE
Mathieu NOE 2023-2-9
hello
try this
b= [1 -2 4];
freqz(b,1)

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