# randu

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## Random Numbers from Congruential Generator RANDU400 triples of successive random numbers were taken from the VAX FORTRAN function RANDU running under VMS 1.5. ## Usagerandu ## FormatA data frame with 400 observations on 3 variables named ## DetailsIn three dimensional displays it is evident that the triples fall on 15 parallel planes in 3-space. This can be shown theoretically to be true for all triples from the RANDU generator. These particular 400 triples start 5 apart in the sequence, that is they are ((U[5i+1], U[5i+2], U[5i+3]), i= 0, ..., 399), and they are rounded to 6 decimal places. Under VMS versions 2.0 and higher, this problem has been fixed. ## SourceDavid Donoho ## Examples## We could re-generate the dataset by the following R code seed <- as.double(1) RANDU <- function() { seed <<- ((2^16 + 3) * seed) %% (2^31) seed/(2^31) } for(i in 1:400) { U <- c(RANDU(), RANDU(), RANDU(), RANDU(), RANDU()) print(round(U[1:3], 6)) } |

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dataset-34050.csv | 10.42 KB |