Solar Trends: Sunspot Numbers Since 1749

September 17, 2009
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(This article was first published on Climate Charts & Graphs » R scripts, and kindly contributed to R-bloggers)

This is the 1st in a series of  posts I will be doing on solar trends. In this post, I show how to retrieve online monthly sunspot data back to 1749, calculate average annual sunspot numbers (SSN),  plot the monthly and annual average SSN as well as a lowess smooth, add the Solar [...]

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