Random-Number Seed
The seed of the random number generator can be set as follows:
flag
Random:setSeed
(default = off
)
Indicates whether a user-set seed should be used every time the
Pythia::init
routine is called. If off, the random number
generator is initialized with its default seed at the beginning
of the run, and never again. If on, each new Pythia::init
call (should several be made in the same run) results in the random
number being re-initialized, thereby possibly starting over with the
same sequence, if you do not watch out.
mode
Random:seed
(default = -1
; maximum = 900000000
)
The seed to be used, if setSeed
is on.
A negative value gives the default seed,
a value 0 gives a random seed based on the time, and
a value between 1 and 900,000,000 a unique different random number
sequence.
For more on random numbers see here.