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Yearly sunspots data 1700-2008

Description

Yearly (1700-2008) data on sunspots from the National Geophysical Data Center.

Notes

Number of Observations - 309 (Annual 1700 - 2008)
Number of Variables - 1
Variable name definitions::

    SUNACTIVITY - Number of sunspots for each year

The data file contains a 'YEAR' variable that is not returned by load.

Source

http://www.ngdc.noaa.gov/stp/solar/solarda3.html

The original dataset contains monthly data on sunspot activity in the file ./src/sunspots_yearly.dat. There is also sunspots_monthly.dat.

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