Sample n Rows By Group From a Table

Source: R/sample_n_by.R

sample n rows by group from a table using the sample_n() function.

sample_n_by(data, ..., size = 1, replace = FALSE)

Arguments

data

a data frame

...

Variables to group by

size

the number of rows to select

replace

with or without replacement?

Examples

ToothGrowth %>% sample_n_by(dose, supp, size = 2)
#> # A tibble: 12 × 3
#>      len supp   dose
#>    <dbl> <fct> <dbl>
#>  1  14.5 OJ      0.5
#>  2   8.2 OJ      0.5
#>  3   5.2 VC      0.5
#>  4   7   VC      0.5
#>  5  27.3 OJ      1  
#>  6  25.8 OJ      1  
#>  7  22.5 VC      1  
#>  8  13.6 VC      1  
#>  9  24.8 OJ      2  
#> 10  30.9 OJ      2  
#> 11  23.3 VC      2  
#> 12  18.5 VC      2