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\details{
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\details{
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  \code{clusterCall} calls a function \code{fun} with identical
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  \code{clusterCall} calls a function \code{fun} with identical
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  arguments \code{...} on each node.
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  arguments \code{...} on each node.
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  \code{clusterEvalQ} evaluates a literal expression on each cluster
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  \code{clusterEvalQ} evaluates a literal expression on each cluster
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  node.  It a parallel version of \code{\link{evalq}}, and is a convenience
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  node.  It is a parallel version of \code{\link{evalq}}, and is a
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  function invoking \code{clusterCall}.
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  convenience function invoking \code{clusterCall}.
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  \code{clusterApply} calls \code{fun} on the first node with
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  \code{clusterApply} calls \code{fun} on the first node with
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  arguments \code{seq[[1]]} and \code{...}, on the second node with
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  arguments \code{seq[[1]]} and \code{...}, on the second node with
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  \code{seq[[2]]} and \code{...}, and so on, recycling nodes as needed.
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  \code{seq[[2]]} and \code{...}, and so on, recycling nodes as needed.
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