wangtong at usc.edu
Tue May 15 08:01:34 CEST 2007
In this case, how do I choose numbers to make sure set_seed(n1,n2) and set.seed(n) produce the same result ?
I am asking because my C code worked correctly if I compile it to produce .exe file and ran it , but it gave strange results if it is compiled to .dll file and dynamically loaded into R and call with .C( ).
To debug, I need to let them produce the same random number under two different situation so I can tell what is wrong in R.
Thanks a lot.
----- Original Message -----
From: Prof Brian Ripley <ripley at stats.ox.ac.uk>
Date: Monday, May 14, 2007 9:40 pm
Subject: Re: [Rd] set_seed
To: Tong Wang <wangtong at usc.edu>
Cc: R-devel <r-devel at r-project.org>
> On Mon, 14 May 2007, Tong Wang wrote:
> > Hi, All:
> > It seemed set_seed is usable only when Rmath is used as a
> > library, then what should I use when I need to link to R.dll.
> When you link to R.dll you are running R, so you can call
> set.seed() via
> eval or via do_setseed.
> Brian D. Ripley, ripley at stats.ox.ac.uk
> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
> University of Oxford, Tel: +44 1865 272861 (self)
> 1 South Parks Road, +44 1865 272866 (PA)
> Oxford OX1 3TG, UK Fax: +44 1865 272595
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