[Rd] quantiles of the hypergeometric distribution (PR#502)

[lbaring@stochastik.uni-hannover.de]

Hello!

I use R-version 1.0.0
To get the 0.95 quantile of the hypergeometric
distribution with the parameters m=45000,n=5000 and
k=600 I use the R-command 

> qhyper(0.95,45000,5000,600).


The value obtained is 600. However, the true value
is 552. The latter can be obtained for example by
calling the corresponding distribution function 
with the R commands 

> x<-540:580
> phyper(x,45000,5000,600)   

The value 552 is obtained also by the usual normal
approximation.


Overall, it seems that R produces errors when calling
qhyper(p,m,n,k) for large values of the parametes 
m,n or k.

Sincerely
L. Baringhaus

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._