For this example, we will forecast the Fraser River levels given the data from https://datamarket.com/data/set/22nm/fraser-river-at-hope-1913-1990#!ds=22nm&display=line . I was not able to find a suitable source so I extracted the data by hand from the site into a local file.
We will be using the R forecast package. You have to add this package to your setup (as described at the start of this chapter).
The R script we will be using is as follows:
library(forecast) fraser <- scan("fraser.txt") plot(fraser) fraser.ts <- ts(fraser, frequency=12, start=c(1913,3)) fraser.stl = stl(fraser.ts, s.window="periodic") monthplot(fraser.stl) seasonplot(fraser.ts)
The output of interest in this example are the three plots: simple plot, monthly, ...