The following data shows waiting time between eruptions and the duration of the eruption for the Old Faithful geyser in Yellowstone National Park, Wyoming, USA.
data(faithful)
View(faithful)
head(faithful)
## eruptions waiting
## 1 3.600 79
## 2 1.800 54
## 3 3.333 74
## 4 2.283 62
## 5 4.533 85
## 6 2.883 55
head(faithful,8)
## ## eruptions 1 3.600 waiting
79
## 2 1.800 54
## 3 3.333 74
## 4 2.283 62
## 5 4.533 85
## 6 2.883 55
## 7 4.700 88
## 8 3.600 85
## [1] "Number of columns of the matrix: "
## [1] 2
## [1] "Number of columns of the matrix: "
## [1] 272
IQR(faithful$waiting)
## [1] 24
## [1] 70.89706
## [1] 76
## [1] 13.59497
quantile(faithful$waiting)
## 0% 25% 50% 75% 100%
## 43 58 76 82 96
quantile(faithful$waiting,c(0.1,0.3))
## 10% 30%
## 51 60
cor(faithful$eruptions,faithful$waiting)
## [1] 0.9008112
Modes <- function(x) { ux <- unique(x)
tab <- tabulate(match(x, ux)) ux[tab == max(tab)]
}
Modes(faithful$waiting)
## [1] 78
boxplot(faithful$waiting, main="time between eruptions", col="red")
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