On 28 January 2010 at 17:59, Guillaume Yziquel wrote: | Guillaume Yziquel a écrit : | > Dirk Eddelbuettel a écrit : | >> | >> 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, | | OK. So concerning the headers: | | #define MATHLIB_STANDALONE | #include <Rmath.h> | | Concerning dependencies: compile against only libRmath.so. Not against | libR.so. (I wonder why this is so crucial, though...)
By design as libRmath is meanth to __standalone__ hence indepdent of R. This is a a feature. This is probably not what _you_ want as you are embedding R, so you need libR. | Concerning documentation: Section 9 The standalone Rmath library from | the R-admin.pdf documentation. | | This solved my problem, since I'm able to generated random values with | norm_rand, unif_rand, etc... | | Thank you for your help. Always a pleasure. Dirk -- Three out of two people have difficulties with fractions. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
