resets the pseudorandom generator, using n as a seed.
resets the generator, using as a seed the time of day and certain attributes of the current Wolfram System session.
Details and Options
- You can use SeedRandom[n] to make sure you get the same sequence of pseudorandom numbers on different occasions.
- SeedRandom affects RandomInteger, RandomReal, RandomComplex, RandomPrime, RandomChoice, RandomSample, and RandomVariate.
- SeedRandom[Method->"method"] specifies what method should be used for the pseudorandom generator.
- SeedRandom[n,Method->"method"] resets the generator, specifying both a seed and the method to use.
- SeedRandom[n] affects only the current generator; SeedRandom[n, Method->All] affects all generators for which seeds have been given.
- Typical possible methods include:
"Congruential" linear congruential generator (low-quality randomness) "ExtendedCA" extended cellular automaton generator (default) "Legacy" default generators from before Version 6.0 "MersenneTwister" Mersenne twister shift register generator "MKL" Intel MKL generator (Intel-based systems) "Rule30CA" Wolfram Rule 30 generator
- Different methods may give sequences with different levels of randomness.
Examplesopen allclose all
Basic Examples (1)
Use SeedRandom to make random numbers repeatable:
Introduced in 1988
(1.0)| Updated in 2007