Hanning Filter
Applies a Hanning filter of length n to x.
hanning(x, n = 7)
x |
a vector |
n |
length of the Hanning filter, defaults to 7 |
This applies a low frequency Hanning (a.k.a. Hann) filter to
x with weight set to n.
A filtered vector.
Andy Bunn. Patched and improved by Mikko Korpela.
Oppenheim, A. V., Schafer, R. W., and Buck, J. R. (1999) Discrete-Time Signal Processing. Prentice-Hall, 2nd edition. ISBN-13: 978-0-13-754920-7.
library(graphics)
library(utils)
data(ca533)
yrs <- time(ca533)
y <- ca533[, 1]
not.na <- !is.na(y)
yrs <- yrs[not.na]
y <- y[not.na]
plot(yrs, y, xlab = "Years", ylab = "Series1 (mm)",
type = "l", col = "grey")
lines(yrs, hanning(y, n = 9), col = "red", lwd = 2)
lines(yrs, hanning(y, n = 21), col = "blue", lwd = 2)
legend("topright", c("Series", "n=9", "n=21"),
fill=c("grey", "red", "blue"))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.