Formatting RNG Information
These functions retrieve/prints formated information about RNGs.
RNGstr(object, n = 7L, ...) RNGtype(object, ..., provider = FALSE) showRNG(object = getRNG(), indent = "#", ...) RNGinfo(object = getRNG(), ...) RNGdigest(object = getRNG())
object |
RNG seed (i.e. an integer vector), or an object that contains
embedded RNG data.
For |
n |
maximum length for a seed to be showed in full.
If the seed has length greater than |
... |
extra arguments passed to |
provider |
logical that indicates if the library that provides the RNG should also be returned as an extra element. |
indent |
character string to use as indentation prefix in the output
from |
All functions can be called with objects that are – valid –
RNG seeds or contain embedded RNG data, but none of them change the current
RNG setting.
To effectively change the current settings on should use setRNG.
a single character string
RNGtype returns a named character vector containing the types of the random number generator, which correspond
to the arguments accepted by base::RNGkind.
Note that starting with R 3.6, the vector has length 3, while in previous R versions it has length 2 (no sample.kind element).
RNGstr: returns a description of an RNG seed as a single character string.
It formats seeds by collapsing them in a comma separated string. By default, seeds that contain more than 7L integers, have their 3 first values collapsed plus a digest hash of the complete seed.
RNGtype: extract the kinds of RNG and Normal RNG.
It returns the same type of values as RNGkind() (character strings),
except that it can extract the RNG settings from an object.
If object is missing it returns the kinds of the current RNG settings,
i.e. it is identical to RNGkind().
showRNG: displays human readable information about RNG settings.
If object is missing it displays information about the current RNG.
RNGinfo: is equivalent to RNGtype but returns a named
list instead of an unnamed character vector.
# default is a 626-long integer RNGstr() # what would be the seed after seeding with set.seed(1234) RNGstr(1234) # another RNG (short seed) RNGstr(c(401L, 1L, 1L)) # no validity check is performed RNGstr(2:3) # get RNG type RNGtype() RNGtype(provider=TRUE) RNGtype(1:3) # type from encoded RNG kind RNGtype(107L) # this is different from the following which treats 107 as a seed for set.seed RNGtype(107) showRNG() # as after set.seed(1234) showRNG(1234) showRNG() set.seed(1234) showRNG() # direct seeding showRNG(1:3) # this does not change the current RNG showRNG() showRNG(provider=TRUE) # get info as a list RNGinfo() RNGinfo(provider=TRUE) # from encoded RNG kind RNGinfo(107) # compute digest hash from RNG settings RNGdigest() RNGdigest(1234) # no validity check is performed RNGdigest(2:3)
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