Remove Polynomial Trend
detrend removes the polynomial trend of order p from the data
x.
detrend(x, p = 1)
x |
Input vector or matrix. If |
p |
Order of the polynomial. Default: 1. The order of the polynomial can
also be given as a string, in which case |
The detrended data, of same type and dimensions as x
Kurt Hornik, Kurt.Hornik@wu-wien.ac.at.
Conversion to R by Geert van Boxtel, G.J.M.vanBoxtel@gmail.com.
t <- 0:20
x <- 3 * sin(t) + t
y <- detrend(x)
plot(t, x, type = "l", ylim = c(-5, 25), xlab = "", ylab = "")
lines(t, y, col = "red")
lines(t, x - y, lty = 2)
legend('topleft', legend = c('Input Data', 'Detrended Data', 'Trend'),
col = c(1, 2 ,1), lty = c(1, 1, 2))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.