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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 2011-2018 R Core Team
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% Copyright 2011-2018 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{RNGstreams}
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\name{RNGstreams}
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\title{Implementation of Pierre L'Ecuyer's RngStreams}
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\alias{nextRNGStream}
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\alias{nextRNGStream}
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\alias{nextRNGSubStream}
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\alias{nextRNGSubStream}
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\alias{clusterSetRNGStream}
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\alias{clusterSetRNGStream}
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\alias{mc.reset.stream}
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\alias{mc.reset.stream}
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\title{Implementation of Pierre L'Ecuyer's RngStreams}
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\description{
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\description{
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  This is an \R re-implementation of Pierre L'Ecuyer's \sQuote{RngStreams}
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  This is an \R re-implementation of Pierre L'Ecuyer's \sQuote{RngStreams}
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  multiple streams of pseudo-random numbers.
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  multiple streams of pseudo-random numbers.
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}
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}
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\usage{
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\usage{
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  \code{clusterSetRNGStream} selects the \code{"L'Ecuyer-CMRG"} RNG and
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  \code{clusterSetRNGStream} selects the \code{"L'Ecuyer-CMRG"} RNG and
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  then distributes streams to the members of a cluster, optionally
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  then distributes streams to the members of a cluster, optionally
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  setting the seed of the streams by \code{set.seed(iseed)} (otherwise
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  setting the seed of the streams by \code{set.seed(iseed)} (otherwise
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  they are set from the current seed of the master process: after
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  they are set from the current seed of the master process: after
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  selecting the L'Ecuyer generator).
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  selecting the L'Ecuyer generator).
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#ifdef unix
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  Calling \code{mc.reset.stream()} after setting the L'Ecuyer random
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  When not on Windows, Calling \code{mc.reset.stream()} after setting
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  number generator and seed makes runs from
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  the L'Ecuyer random number generator and seed makes runs from
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  \code{\link{mcparallel}(mc.set.seed = TRUE)} reproducible.  This is
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  \code{\link{mcparallel}(mc.set.seed = TRUE)} reproducible.  This is
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  done internally in \code{\link{mclapply}} and \code{\link{pvec}}.
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  done internally in \code{\link{mclapply}} and \code{\link{pvec}}.
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  (Note that it does not set the seed in the master process, so does not
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  (Note that it does not set the seed in the master process, so does not
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  affect the fallback-to-serial versions of these functions.)
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  affect the fallback-to-serial versions of these functions.)
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#endif
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}
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}
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\value{
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\value{
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  For \code{nextRNGStream} and \code{nextRNGSubStream},
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  For \code{nextRNGStream} and \code{nextRNGSubStream},
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  a value which can be assigned to \code{.Random.seed}.
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  a value which can be assigned to \code{.Random.seed}.
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}
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}