sunspot.month

Monthly Sunspot Data, 1749--1997

Monthly numbers of sunspots.

Keywords
datasets
Usage
sunspot.month
Format

The univariate time series sunspot.year and sunspot.month contain 289 and 2988 observations, respectively. The objects are of class "ts".

Source

World Data Center-C1 For Sunspot Index Royal Observatory of Belgium, Av. Circulaire, 3, B-1180 BRUSSELS http://www.oma.be/KSB-ORB/SIDC/sidc_txt.html

See Also

sunspot.month is a longer version of sunspots that runs until 1988 rather than 1983.

Aliases
  • sunspot.month
Examples
library(datasets) require(stats); require(graphics) ## Compare the monthly series plot (sunspot.month, main = "sunspot.month [stats]", col = 2) lines(sunspots) # "very barely" see something ## Now look at the difference : all(tsp(sunspots) [c(1,3)] == tsp(sunspot.month)[c(1,3)]) ## Start & Periodicity are the same n1 <- length(sunspots) table(eq <- sunspots == sunspot.month[1:n1]) #> 132 are different ! i <- which(!eq) rug(time(eq)[i]) s1 <- sunspots[i] ; s2 <- sunspot.month[i] cbind(i = i, sunspots = s1, ss.month = s2, perc.diff = round(100*2*abs(s1-s2)/(s1+s2), 1))
Documentation reproduced from package datasets, version 3.0.3, License: Part of R 3.0.3

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