repeatable
From shiny v1.5.0
by Winston Chang
Make a random number generator repeatable
Given a function that generates random data, returns a wrapped version of that function that always uses the same seed when called. The seed to use can be passed in explicitly if desired; otherwise, a random number is used.
Usage
repeatable(rngfunc, seed = stats::runif(1, 0, .Machine$integer.max))Arguments
- rngfunc
The function that is affected by the R session's seed.
- seed
The seed to set every time the resulting function is called.
Value
A repeatable version of the function that was passed in.
Note
When called, the returned function attempts to preserve the R session's
current seed by snapshotting and restoring
base::.Random.seed().
Examples
# NOT RUN {
rnormA <- repeatable(rnorm)
rnormB <- repeatable(rnorm)
rnormA(3) # [1] 1.8285879 -0.7468041 -0.4639111
rnormA(3) # [1] 1.8285879 -0.7468041 -0.4639111
rnormA(5) # [1] 1.8285879 -0.7468041 -0.4639111 -1.6510126 -1.4686924
rnormB(5) # [1] -0.7946034 0.2568374 -0.6567597 1.2451387 -0.8375699
# }
Community examples
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