Hi,

With R version 2.10.0 (2009-10-26) on Windows, I computed the p=1.e-20 quantile of the geometric distribution with parameter prob=0.1.

qgeom(1.e-20,0.1)
[1] -1

But this is not possible, since X=0,1,2,...

I guess that this might be a bug in the quantile function, which should use the log1p function, instead of the naive formula.

Am I correct ?

Best regards,

Michaƫl

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