• vec_rep() repeats an entire vector a set number of times.

  • vec_rep_each() repeats each element of a vector a set number of times.

vec_rep(x, times)

vec_rep_each(x, times)

Arguments

x

A vector.

times

For vec_rep(), a single integer for the number of times to repeat the entire vector.

For vec_rep_each(), an integer vector of the number of times to repeat each element of x. times will be recycled to the size of x.

Value

For vec_rep(), a vector the same type as x with size vec_size(x) * times.

For vec_rep_each(), a vector the same type as x with size sum(vec_recycle(times, vec_size(x))).

Details

vec_rep() and vec_rep_each() work along the size of x, rather than its length. For data frames, this means that rows are repeated rather than columns.

Dependencies

Examples

# Repeat the entire vector vec_rep(1:2, 3)
#> [1] 1 2 1 2 1 2
# Repeat within each vector vec_rep_each(1:2, 3)
#> [1] 1 1 1 2 2 2
vec_rep_each(1:2, c(3, 4))
#> [1] 1 1 1 2 2 2 2
df <- data.frame(x = 1:2, y = 3:4) # `rep()` repeats columns of data frames, and returns lists rep(df, each = 2)
#> $x #> [1] 1 2 #> #> $x #> [1] 1 2 #> #> $y #> [1] 3 4 #> #> $y #> [1] 3 4 #>
# `vec_rep()` and `vec_rep_each()` repeat rows, and return data frames vec_rep(df, 2)
#> x y #> 1 1 3 #> 2 2 4 #> 3 1 3 #> 4 2 4
vec_rep_each(df, 2)
#> x y #> 1 1 3 #> 2 1 3 #> 3 2 4 #> 4 2 4