The makeIwrapper function wraps an R function to produce an
iterator constructor. It is used to construct random sampling
iterators in this package; for instance irnorm is defined as
irnorm <- makeIwrapper(rnorm).
Arguments
- FUN
a function that generates different values each time it is called; typically one of the standard random number generator functions.
Details
The resulting iterator constructors all take an optional
count argument which specifies the number of times the
resulting iterator should fire. They also have an argument
independent which enables independent tracking of the random
number seed. The isample function is an example of one such
iterator constructoe (as are irnorm, irunif, etc.).
Original version appeared in the iterators package.
Examples
# create an iterator maker for the sample function
mysample <- makeIwrapper(sample)
# use this iterator maker to generate an iterator that will generate three five
# member samples from the sequence 1:100
it <- mysample(1:100, 5, count = 3)
nextOr(it)
#> [1] 7 75 11 77 63
nextOr(it)
#> [1] 98 15 37 14 90
nextOr(it)
#> [1] 49 28 82 59 17
nextOr(it, NULL) # NULL
#> NULL