R help - Apr 2008 - Passing Inf from R to C using .C("myLibC"...

Dear all,
How can I pass '-Inf' and 'Inf' values from R to C code using
the
function '.C(...)'. When running my code, I get an error since C does 
not recognize -Inf and Inf values. Of course, I could use instead a very 
low (or high) number, but I was wondering whether a more elegant 
solution exists. Thanks for your help.
-- 
David Ardia
H-building, room 11-26
Econometric Institute
Erasmus University
PO Box 1738
NL 3000 DR Rotterdam
The Netherlands
Phone: +31 (0)10 408 2269

On 4/24/2008 9:01 AM, Ardia David wrote:
> Dear all,
> How can I pass '-Inf' and 'Inf' values from R to C code
using the
> function '.C(...)'. When running my code, I get an error since C
does
> not recognize -Inf and Inf values. Of course, I could use instead a very 
> low (or high) number, but I was wondering whether a more elegant 
> solution exists. Thanks for your help.
C doesn't have any problem, but many C functions do, so .C by default 
prevents you from doing this.  However, if you know that it is safe, use 
the NAOK arg to .C and special values will get through.  (The name NAOK 
may not suggest it also means Inf is okay, but the docs do clearly say 
that.)

Duncan Murdoch