setSeedDS {dsBase} | R Documentation |
An aggregate serverside function that primes the pseudorandom number generator in a data source
setSeedDS(seedtext = NULL, kind = NULL, normal.kind = NULL)
seedtext |
this is simply the value of the <seed.as.integer> argument of ds.setSeed, ds.rNorm, ds.rUnif, ds.rPois of ds.rBinom coerced into character format. This is done by the clientside functions themselves and does not require the DataSHIELD user to do anything. Please see the help for these clientside functions, and in particular, the information for the argument <seed.as.integer> for more details. |
kind |
see help for set.seed() function in native R |
normal.kind |
see help for set.seed() function in native R |
setSeedDS is effectively equivalent to the native R function set.seed() and so the help for that function can provide many additional details. The only very minor difference is that the first argument of setSeedDS, <seedtext> takes the integer priming seed in character format. However, for the user that integer is still specified directly as an integer as the <seed.as.integer> argument of one of the clientside functions ds.setSeed, ds.rNorm ..... Each of these clientside functions coerces the integer to character format calls setSeedDS and the first active line of code in setSeedDS converts the character string back to an integer and treats it as the first argument <seed> of the native R function set.seed(). The two other arguments of set.seed() in native R, <kind> and <normal.kind> are both defaulted by specifying them as NULL. This defaulting is hard wired into the setSeedDS function and as this cannot be changed by the analyst it means that setSeedDS is much less flexible than native R's set.seed() function. If any DataSHIELD user requires some aspect of this flexibility returned the development team can be approached, but unless you are actually doing theoretical work with random number generators it is likely that the
Sets the values of the vector of integers of length 626 known as .Random.seed on each data source that is the true current state of the random seed in each source.
Paul Burton for DataSHIELD Development Team