Data: "Tree rings"
Description: tree ring indices, Douglas fir, Snake river basin, U.S., annual, from 1282 to 1950
Source: Time Series Data Library maintained by Rob Hyndman
Parameters: window length = 120
Figure 1.3: the time series component reconstructed from the leading 7 eigentriples (red line) and the initial time series
Figure 1.4: residuals of the reconstruction from the leading 7 eigentriples