| ts_fil_emd | R Documentation |
Empirical Mode Decomposition (EMD) filter that decomposes a signal into intrinsic mode functions (IMFs) and reconstructs a smoothed component.
ts_fil_emd(noise = 0.1, trials = 5)
noise |
noise |
trials |
trials |
A ts_fil_emd object.
N. E. Huang et al. (1998). The Empirical Mode Decomposition and the Hilbert Spectrum for nonlinear and non-stationary time series analysis. Proceedings of the Royal Society A.
# EMD-based smoothing: remove first IMF as noise
# Load package and example data
library(daltoolbox)
data(tsd)
tsd$y[9] <- 2 * tsd$y[9] # inject an outlier
# Fit EMD filter and reconstruct without the first (noisiest) IMF
filter <- ts_fil_emd()
filter <- fit(filter, tsd$y)
y <- transform(filter, tsd$y)
# Compare original vs smoothed series
plot_ts_pred(y = tsd$y, yadj = y)
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