sdrni {Nmix}

Random number initialiser, allowing retrospective replication

Description

Front-end to standard R random number seed setter, allowing retrospective replication

Usage

sdrni(seed) 

Arguments

seed

non-negative integer random number seed, often 0 for absolute re-initialisation as with set.seed(NULL)

Details

Using sdrni to initialise random number stream allows a decision to repeat a simulation exactly, presumably with additional outputs, need only be made after seeing results; see Examples

Value

seed if input value is positive, otherwise the value that if used in a subsequent call will deliver exactly the same random numbers

Author(s)

Peter J. Green

Examples

sdrni(0)
runif(5)
keep<-sdrni(0)
runif(5)
sdrni(keep)
runif(5)