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ex1509

Sunspot Counts for 1749–1948

Description

Time series data set of annual counts of sunspots.

Usage

ex1509

Format

A data frame with 200 observations on the following 2 variables.

Year

year

Spots

number of sunspots

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Waldmeier, M. (1961). The Sunspot Activity in the Years 1610–1960, Federal Observatory, Zurich.

Examples

str(ex1509)
Sleuth2

Data Sets from Ramsey and Schafer's "Statistical Sleuth (2nd Ed)"

v2.0-5
GPL (>= 2)
Authors
Original by F.L. Ramsey and D.W. Schafer; modifications by Daniel W. Schafer, Jeannie Sifneos and Berwin A. Turlach; vignettes contributed by Nicholas Horton, Kate Aloisio and Ruobing Zhang, with corrections by Randall Pruim
Initial release
2019-01-24

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