Replicate elements of vector in R programming – rep() Method

In the R programming language, A very useful function for creating a vector by repeating a given numbervector with the specified number of times is the rep().

The general structure of rep() : rep(v1,n1).

Here, v1 is repeated n1 times.

R – replicate elements of vector

The forms of rep() functions :

• rep(v1, times=)
• rep(v1, each=)
• rep(v1, length=)

Example 1:

R

# Replicate '0' 5 time
rep(0, 5)

Output:

[1] 0 0 0 0 0

Example 2:

rep(v1,  times=)

R

# 1,2,3 repeated 3 times in sequencially
rep(1:3,times=3)

Output:

[1] 1 2 3 1 2 3 1 2 3

Example 3:

rep(v1,  each=)

R

# 1,2,3 repeated 3 times
rep(1:3,each=3)

Output:

[1] 1 2 3 1 2 3 1 2 3

Example 4:

rep(v1,  length=)

R

# generate a vector 1,2,3
x<-1:3

# vector x is replicated such that the
# length is five.
rep(x, length=5)

Output:

1 2 3 1 2

Example 5:

R

# 1 is replicated 2 times, and so on
rep(x,c(2,1,3))

Output:

1 1 2 3 3 3