[R] number point under-flow

[Roger D. Peng]

Did you compile with gcc-2.96?  I think there were some 
problems with the floating point arithmetic with that 
compiler (at least for the earlier versions released by Red 
Hat).

-roger

Arne.Muller at aventis.com wrote:
> Hello,
> 
> I've come across the following situation in R-1.8.1 (compile + running under
> RedHat 7.1):
> 
> 
>>phyper(24, 514, 5961-514, 53, lower.tail=T)
> 
> [1] 1
> 
>>phyper(24, 514, 5961-514, 53, lower.tail=F)
> 
> [1] -1.037310e-11
> 
> I'd expect the later to be 0 or some very small positive number. Is this a
> number under-flow of the calculation? Do you think I'm safe if I just set the
> result to 0 in these cases?
> 
> 	kind regards,
> 
> 	Arne
> 
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