# Errata: In Figure 2.7, the coefficients are for an update period of one day

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Location: page 40, line 2

In the caption for Figure 2.7, the coefficients listed for use in equation (2.13) are for a discrete time index measured in days (not months, as is implied in the text). Hence, the caption should read

Using the parameters , and in equation (2.13) with daily updates, the period and magnitude ...

(Contributed by G. Verghese, 4 Mar 2010)