Tukey (tapered cosine) window
Return the filter coefficients of a Tukey window (also known as the
cosine-tapered window) of length n.
tukeywin(n, r = 1/2)
n |
Window length, specified as a positive integer. |
r |
Cosine fraction, specified as a real scalar. The Tukey window is a
rectangular window with the first and last |
The Tukey window, also known as the tapered cosine window, can be regarded as
a cosine lobe that is convolved with a rectangular window. r defines
the ratio between the constant section and and the cosine section. It has to
be between 0 and 1. The function returns a Hann window for r equal to
1 and a rectangular window for r equal to 0.
Tukey window, returned as a vector.
Laurent Mazet, mazet@crm.mot.com.
Conversion to R by Geert van Boxtel, G.J.M.vanBoxtel@gmail.com.
n <- 128 t0 <- tukeywin(n, 0) # Equivalent to a rectangular window t25 <- tukeywin(n, 0.25) t5 <- tukeywin(n) # default r = 0.5 t75 <- tukeywin(n, 0.75) t1 <- tukeywin(n, 1) # Equivalent to a Hann window plot(t0, type = "l", xlab = "Samples", ylab =" Amplitude", ylim=c(0,1.2)) lines(t25, col = 2) lines(t5, col = 3) lines(t75, col = 4) lines(t1, col = 5)
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