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How can I get the current seed from the current RNG state in R? For instance,

a <- 1987
set.seed(a) 
b <- .Random.seed

How can I retrieve a (i.e., 1987) from b? Thank you.

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  • I don't think you can. Strongly related: stackoverflow.com/q/65881975/3358272. Why are you trying to retrieve the integer seed from the current state of the RNG? Commented Mar 23, 2022 at 23:03
  • 2
    not sure the point or if it is possible, but you can brute force it s <- lapply(1:10000, function(x) {set.seed(x); .Random.seed}); which(sapply(s, identical, b)) or you could write a while loop to run longer Commented Mar 24, 2022 at 0:26
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