BUILT-IN MATHEMATICA SYMBOL
SeedRandom
SeedRandom[n]
resets the pseudorandom generator, using n as a seed.
SeedRandom[]
resets the generator, using as a seed the time of day and certain attributes of the current Mathematica session.
- 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 Mathematica 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.
Use SeedRandom to make random numbers repeatable:
| Out[1]= |  |
| Out[2]= |  |
New in 1 | Last modified in 6
