.lec.CurrentStream sets the current stream for usage
with the standard R functions for generating random numbers such as
runif or rnorm. .lec.CurrentStreamEnd unsets it.
a length 2 character vector, the old rng kinds
(possiblly returned by .lec.CurrentStream).
Details
.lec.CurrentStream sets the RNGkind to user-defined. All succeeding calls of R built-in genertors will
generate random numbers from the stream name, until
.lec.CurrentStreamEnd is called. .lec.CurrentStreamEnd updates the RNG state of the stream name in the
table .lec.Random.seed.table and
sets the RNGkind to kind.old. These two functions are meant to be always used as a pair. Thus, one can arbitrarily switch
generating between different streams.
Value
.lec.CurrentStream returns a two-element character vector of the RNG and normal kinds
in use before the call. .lec.CurrentStreamEnd returns a character string giving the name of the unset current stream.
Examples
nstreams <- 10 # number of streams
names <- paste("mystream",1:nstreams,sep="")
.lec.CreateStream(names)
for (i in 1:nstreams) { # generate 10 RNs from each stream
.lec.CurrentStream(names[i])
print(paste("stream no.",i))
print(runif(10))
.lec.CurrentStreamEnd()
}