fir1 | R Documentation |
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 |
order of the filter (1 less than the length of the filter) |
w |
band edges, strictly increasing vector in the range [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. |
scale |
whether to normalize or not. Use |
The FIR filter coefficients, an array of length(n+1)
, of class Ma
.
Original Octave version by Paul Kienzle, pkienzle@user.sf.net. Conversion to R by Tom Short.
https://en.wikipedia.org/wiki/Fir_filter
Octave Forge https://octave.sourceforge.io/
filter
, Ma
,
fftfilt
, fir2
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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