fir1

Signal Processing

FIR lowpass filter design using windowed sinc method. Returns an array of n+1 filter coefficients with normalized cutoff frequency Wn. Apply with filter(b, [1], x).

fir1(n, Wn)

fir1(n, Wn, type)

b = fir1(20, 0.3); filter(b, [1], randn(100))

b = fir1(50, 0.25); freqz(b, [1])