RDocumentation: top_n

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if(!require('dplyr')) {
    install.packages('dplyr')
    library('dplyr')
}

df <- data.frame(x = c(6, 4, 1, 10, 3, 1, 1))

df %>% top_n(2)  # highest values
df %>% top_n(-2) # lowest values
# now use
df %>% slice_max(x, n = 2)
df %>% slice_min(x, n = 2)

# top_frac() -> prop argument of slice_min()/slice_max()
df %>% top_frac(.5)
# ->
df %>% slice_max(x, prop = 0.5)