In R, using the HarmonicRegression library, I am trying to fit an harmonic regression model with a trend, but I am struggling to figure out how to call the harmonic.regression function and plot the fitted model.
library(TSA)
library(HarmonicRegression)
data(tempdub)
har_model <- harmonic.regression(tempdub, time(tempdub), Tau = 24, normalize = TRUE, norm.pol = FALSE, norm.pol.degree = 1, trend.eliminate = FALSE, trend.degree = 1)
plot(ts(fitted(har_model), freq=1, start=c(1964,1)), type='l', ylim=range(c(fitted(har_model), tempdub)))
points(tempdub)
The first error I encounter is:
Error in if (nrow(inputts) != length(inputtime)) stop(paste("Length of time series (inputts):", :
argument is of length zero
Any idea how this can be achieved?
library("TSA")
library("HarmonicRegression")
data(tempdub)
har_model <- harmonic.regression(as.vector(tempdub),
1:length(tempdub), Tau = 12,
normalize = TRUE, norm.pol = FALSE, norm.pol.degree = 1,
trend.eliminate = FALSE, trend.degree = 1)
plot(tempdub)
lines(ts(har_model$fit.vals, freq=12, start=c(1964,1)), lty=2, col=3)
https://cran.r-project.org/web/packages/HarmonicRegression/HarmonicRegression.pdf
Manual explains that you have to supply inputts and inputtime as a vector or matrix for harmonic.regression().