Repeat Vectors in R

[singh Karan]

How can I repeat vectors in R?

[Greg Charles]

Use the rep function:

rep(c(1,2,3), times=2) # 1 2 3 1 2 3 rep(c(1,2,3), each=2) # 1 1 2 2 3 3

[Aakash Bachheriya]

You  can use the rep() function in several ways if you want to repeat the complete vector.
For examples: specify the argument times 1. To repeat the vector c(0, 0, 7) three times,
use this code:

> rep(c(0, 0, 7), times = 4)
[1] 0 0 7 0 0 7 0 0 7 0 0 7 2

We can also repeat every value by specifying the argument each, like this:

> rep(c(2, 4, 2), each = 2)
[1] 2 2 4 4 2 2 3

We can tell R for each value how often it has to repeat:

> rep(c(0, 7), times = c(4,3))
[1] 0 0 0 0 7 7 7 4

In seq, we use the argument length.out to define R. it will repeat the vector until it reaches that length,
even if the last repetition is incomplete.

> rep(1:3,length.out=9)
[1] 1 2 3 1 2 3 1 2 3

[Sherin Mathew]

R>n<-3
R> rep(1:5,each=n)

Answer is
[1] 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5

[Karl Peterson]

Just to add to the previous answers, which are all great, you can also repeat character vectors.

chars <-  c("A", "B", "C")

rep(chars, 10)

Output: [1] "A" "B" "C" "A" "B" "C" "A" "B" "C" "A" "B" "C" "A" "B" "C" "A" "B" "C" "A" "B" "C" "A" "B" "C" "A"
[26] "B" "C" "A" "B" "C"

[Campbell Ritchie]

Welcome to the Ranch, KP

[Karl Peterson]

Campbell Ritchie wrote:Welcome to the Ranch, KP

Thanks!