stri_rand_strings: Generate Random Strings

View source: R/random.R

stri_rand_stringsR Documentation

Generate Random Strings


Generates (pseudo)random strings of desired lengths.


stri_rand_strings(n, length, pattern = "[A-Za-z0-9]")



single integer, number of observations


integer vector, desired string lengths


character vector specifying character classes to draw elements from, see stringi-search-charclass


Vectorized over length and pattern. If length of length or pattern is greater than n, then redundant elements are ignored. Otherwise, these vectors are recycled if necessary.

This operation may result in non-Unicode-normalized strings and may give peculiar outputs for bidirectional strings.

Sampling of code points from the set specified by pattern is always done with replacement and each code point appears with equal probability.


Returns a character vector.


Marek Gagolewski and other contributors

See Also

The official online manual of stringi at

Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, doi: 10.18637/jss.v103.i02

Other random: stri_rand_lipsum(), stri_rand_shuffle()


stri_rand_strings(5, 10) # 5 strings of length 10
stri_rand_strings(5, sample(1:10, 5, replace=TRUE)) # 5 strings of random lengths
stri_rand_strings(10, 5, '[\\p{script=latin}&\\p{Ll}]') # small letters from the Latin script

# generate n random passwords of length in [8, 14]
# consisting of at least one digit, small and big ASCII letter:
n <- 10
   stri_rand_strings(n, 1, '[0-9]'),
   stri_rand_strings(n, 1, '[a-z]'),
   stri_rand_strings(n, 1, '[A-Z]'),
   stri_rand_strings(n, sample(5:11, 5, replace=TRUE), '[a-zA-Z0-9]')

stringi documentation built on Jan. 11, 2023, 5:18 p.m.