Randomizing order

Problem

You want to randomize the order of a data structure.

Solution

# Create a vector
v <- 11:20
# Randomize the order of the vector
v <- sample(v)
# Create a data frame
data <- data.frame(label=letters[1:5], number=11:15)
data
#>   label number
#> 1     a     11
#> 2     b     12
#> 3     c     13
#> 4     d     14
#> 5     e     15
# Randomize the order of the data frame
data <- data[sample(1:nrow(data)), ]
data
#>   label number
#> 5     e     15
#> 2     b     12
#> 4     d     14
#> 3     c     13
#> 1     a     11

Notes

To make a randomization repeatable, you should set the seed for the random number generator. See ../../Numbers/Generating random numbers and ../../Numbers/Generating repeatable sequences of random numbers for more information.