x<-round(runif(20,0,20),digits=2)
summary(x)
min(x)
max(x)
median(x)
mean(x)
var(x)
sd(x)
sqrt(var(x))
rank(x)
order(x)
order(x,decreasing=T)
x[order(x)]
sort(x)
sort(x,decreasing=T)
sum(x)
round(x)
round(x,2)
fivenum(x)
quantile(x)
quantile(x,c(0,.33,.66,1))
mad(x)
cummax(x)
cummin(x)
cumprod(x)
cor(x,sin(x/20))


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