In This tutorial we will learn about head and tail function in R
Head Function in R: returns the first n rows of a matrix or data frame in R
Tail Function in R: returns the last n rows of a matrix or data frame in R
Syntax for head function in R:
- df – Data frame
- n – number of rows
Example of head function in R:
Lets use mtcars table to demonstrate head function in R
# head function in R head(mtcars)
By default head function in R returns first 6 rows of a data frame or matrix so the output will be
Mazda RX4 21 6 160 110 3.9 2.62 16.46 0 1 4 4
Mazda RX4 Wag 21 6 160 110 3.9 2.875 17.02 0 1 4 4
Datsun 710 22.8 4 108 93 3.85 2.32 18.61 1 1 4 1
Hornet 4 Drive 21.4 6 258 110 3.08 3.21 19.44 1 0 3 1
Hornet Sportabout 18.7 8 360 175 3.15 3.44 17.02 0 0 3 2
Valiant 1 8.1 6 225 105 2.76 3.46 20.22 1 0 3 1
Example of head function in R with Specified rows:
# head function in R with specified rows head(mtcars, n=2)
head function in R returns first 2 rows of a data frame or matrix so the output will be
Mazda RX4 21 6 160 110 3.9 2.62 16.46 0 1 4 4
Mazda RX4 Wag 21 6 160 110 3.9 2.875 17.02 0 1 4 4
Syntax for tail function in R:
- df – Data frame
- n – number of rows
Example of tail function in R:
Lets use mtcars table to demonstrate tail function in R
# tail function in R tail(mtcars)
By default tail function in R returns last 6 rows of a data frame or matrix so the output will be
Porsche 914-2 26 4 120.3 91 4.43 2.14 16.7 0 1 5 2
Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.9 1 1 5 2
Ford Pantera L 15.8 8 351 264 4.22 3.17 14.5 0 1 5 4
Ferrari Dino 19.7 6 145 175 3.62 2.77 15.5 0 1 5 6
Maserati Bora 15 8 301 335 3.54 3.57 14.6 0 1 5 8
Volvo 142E 21.4 4 121 109 4.11 2.78 18.6 1 1 4 2
Example of tail function in R with Specified rows:
# tail function in R with specified rows tail(mtcars, n=2)
tail function in R returns last 2 rows of a data frame or matrix so the output will be
Maserati Bora 15 8 301 335 3.54 3.57 14.6 0 1 5 8
Volvo 142E 21.4 4 121 109 4.11 2.78 18.6 1 1 4 2
