norm_rand() in R-extension vs rnorm in R ---which is better?

-----Original Message-----
From: r-devel-bounces at r-project.org [mailto:r-devel-bounces at r-project.org] On Behalf
Of Kyeongmi Cheon
Sent: Saturday, March 29, 2008 9:09 PM
To: r-devel at r-project.org
Subject: [Rd] norm_rand() in R-extension vs rnorm in R ---which is better?

I need to generate good quality of random numbers from univariate
normal distribution for further transformation. I tried rnorm in R but
it was not good sometimes. Someone said C++ standard library or
Fortran's built-in functions for that are good. I found that there is
double norm_rand() in R-extension.  Does this function, norm_rand()
use the same algorithm as rnorm in R or something similar in C/C++? Or
does anyone know which one between norm_rand() in R-extension and
rnorm in R is better?  If anyone could help, I would appreciate it.
Kyeongmi