Window-based FIR filter design
FIR filter coefficients for a filter with the given order and frequency cutoff.
fir1(
n,
w,
type = c("low", "high", "stop", "pass", "DC-0", "DC-1"),
window = hamming(n + 1),
scale = TRUE
)n |
filter order (1 less than the length of the filter). |
w |
band edges, strictly increasing vector in the range c(0, 1), where 1 is the Nyquist frequency. A scalar for highpass or lowpass filters, a vector pair for bandpass or bandstop, or a vector for an alternating pass/stop filter. |
type |
character specifying filter type, one of |
window |
smoothing window. The returned filter is the same shape as the
smoothing window. Default: |
scale |
whether to normalize or not. Use |
The FIR filter coefficients, a vector of length n + 1, of
class Ma.
Paul Kienzle, pkienzle@users.sf.net,
Conversion to R Tom Short,
adapted by Geert van Boxtel, G.J.M.vanBoxtel@gmail.com.
freqz(fir1(40, 0.3)) freqz(fir1(10, c(0.3, 0.5), "stop")) freqz(fir1(10, c(0.3, 0.5), "pass"))
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