books | R Documentation |
Daily sales of paperback and hardcover books at the same store.
books
Bivariate time series containing the following columns:
Number of paperback sales each day
Number of hardcover sales each day
Makridakis, Wheelwright and Hyndman (1998) Forecasting: methods and applications, John Wiley & Sons: New York. Exercise 4.5.
plot(books)
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