library("ggplot2")
data(airquality$Ozone)
head(airquality$Ozone)
#Ozone concentration in air
barplot(airquality$Ozone,
main='Ozone concentration in air',
xlab='ozone levels',horiz=FALSE)
barplot(airquality$Ozone,
main='Ozone concentration in air',
xlab='ozone levels',horiz=TRUE)
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