volcanicNH | R Documentation |
The volcanicNH
data set contains the dates of major explosive volcanic eruptions in the Northern Hemisphere during 1851-1985.
data(volcanicNH)
A data frame with 55 dates of volanic eruptions with columns:
month
number of month (1-12) in which the eruption occurred.
year
calendar year in which the eruption occurred.
Solow, A.R. (1991). An exploratory analysis of the occurrence of explosive volcanism in the Northern Hemisphere, 1951-1985. Journal of the American Statistical Association, 86, 49-54.
data(volcanicNH) eruptionDates <- volcanicNH$year + volcanicNH$month/12 plot(eruptionDates,rep(0,length(eruptionDates)), xlim=c(1840,2000),ylab = "",yaxt = "n",bty = "n")