Displaying 2 results from an estimated 2 matches for "rziggurat".
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ziggurat
2003 May 30
2
Normal deviate generation - Marsaglia's ziggurat method
Hi:
I was wondering why Marsaglia's new ziggurat method for generating
deviates from the standard normal distribution has not been implemented
in the R base package. I know that it is available in SuppDists
pacakage of Bob Wheeler, as "rziggurat". According my timing tests, it
is about 6 to 7 times faster (on a Pentium 2.4 MHz) machine than the
default Inversion method used in R base package.
thanks,
Ravi.
2002 Nov 26
5
unexpected behaviour of rnorm()
Hello everyone.
If I do
f <- function(n){max(rnorm(n))}
plot(sapply(rep(5000,4000),f)) #[this takes my PC about 30 seconds]
then I get something quite unexpected: gaps in the distribution. For
me, the most noticable one is at about 3.6.
Do others get this? Is it an optical illusion? It can't be right,
can it? Or maybe I just don't understand the good ol' Gaussian very