Problem with R math library.
Dirk Eddelbuettel a ?crit :
Salut Guilluame,
| > val norm_rand : unit -> float
| > Random variates from the standard normal distribution. Bug: currently systematically returns -8.77332116900134373.
|
| Any idea as to why the function systematically returns the same value?
| Is there a way the math library should be initialised?
I think it is pretty clearly documented in R-exts:
However, before these are used, the user must call
GetRNGstate();
and after all the required variates have been generated, call
PutRNGstate();
These essentially read in (or create) `.Random.seed' and write it out
after use.
Fair enough. I admit I've been busy with low detail stuff, and omitted to come back to R-exts. However, I have another question on which I do not find information (I found it once, but do not know how to find it again...): What's the big difference between using the R mathematical library in standalone mode and not in standalone mode? How does it translate in terms of C directives and linking modalities? I've noticed the MATHLIB_STANDALONE macro, but I do not know how I should use it... All the best,
Guillaume Yziquel http://yziquel.homelinux.org/