Random Number Generation

Description

Initialize independent random number streams to be used in the cluster. It uses either the L'Ecuyer's random number generator (package rlecuyer required).

Usage

clusterSetupRNG.FT (cl, type = "RNGstream", streamper="replicate", ...)
clusterSetupRNGstreamRepli (cl, seed=rep(12345,6), n, ...)

Arguments

Details

clusterSetupRNG.FT calls one of the following functions, while passing arguments (cl, ...): For streamper="node", the snow function clusterSetupRNGstream is called; For streamper="replicate", the function clusterSetupRNGstreamRepli is called. In the latter case, the argument n has to be given that corresponds to the total number of streams created for the computation. This mode is used by clusterApplyFT. Note that using the function performParallel, the user does not need to initialize the RNG separately, since it is accomplished within the function.

clusterSetupRNGstreamRepli loads the rlecuyer package and on each node it creates n streams. The streams are named by their ordinal number.

Examples

## Not run: 
cl <- makeClusterFT(3)
r<-10
clusterSetupRNG.FT(cl, streamper="replicate",n=r, seed=rep(1,6))
res<-clusterApplyFT(cl,rep(5,10),rnorm)
stopCluster(res[[2]])
print(res[[1]])
  
## End(Not run)

Results