Useful functions for Vectors

sum of a vector

my_grades <- c(100,80,85,70,90)
sum(my_grades)

## [1] 425

length of a vector

length(my_grades)

## [1] 5

average of a vector

mean(my_grades)

## [1] 85

standard deviation of a vector

sd(my_grades)

## [1] 11.18034

smallest and biggest element

min(my_grades)

## [1] 70

max(my_grades)

## [1] 100

A lot of information

summary(my_grades)

##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##      70      80      85      85      90     100