rep() is a built-in R function that replicates the values in the provided vector. This tutorial shows how to use rep() function in R with 4 examples.
Example 1
The following code is to repeat the number 4 twice.
# repeat the number 4 twice
rep(4, 2)Output:
[1] 4 4
Example 2
# repeat 4 times of the number from 1 to 3
rep(1:3, 4)Output:
[1] 1 2 3 1 2 3 1 2 3 1 2 3
Example 3
You can also add the parameter of length.out to restrict the length of the output. The following is the example.
# add the restriction of length = 5 to the function
rep(1:3, 4, length.out=5)Output:
[1] 1 2 3 1 2
Example 4
You can also the each parameter in rep() to repeat the elements of x each time.
# add each = 3 to repeat the elements in the X (i.e., 1:2)
rep(1:2, 4, each=3)Output:
[1] 1 1 1 2 2 2 1 1 1 2 2 2 1 1 1 2 2 2 1 1 1 2 2 2