iRNGStream {itertools}

Iterators that support parallel RNG

Description

The iRNGStream function creates an infinite iterator that calls nextRNGStream repeatedly, and iRNGSubStream creates an infinite iterator that calls nextRNGSubStream repeatedly.

Usage

iRNGStream(seed)
iRNGSubStream(seed)

Arguments

seed

Either a single number to be passed to set.seed or a vector to be passed to nextRNGStream or nextRNGSubStream.

See Also

set.seed, nextRNGStream, nextRNGSubStream

Examples

it <- iRNGStream(313)
print(nextElem(it))
print(nextElem(it))

## Not run: 
library(foreach)
foreach(1:3, rseed=iRNGSubStream(1970), .combine='c') %dopar% {
  RNGkind("L'Ecuyer-CMRG") # would be better to initialize workers only once
  assign('.Random.seed', rseed, pos=.GlobalEnv)
  runif(1)
}

## End(Not run)