[R] why rgamma(2, 2) gives two random number, but rgamma(1.5, 2) gives one?
Berend Hasselman
bhh at xs4all.nl
Sat Mar 3 21:34:20 CET 2012
On 03-03-2012, at 21:27, C W wrote:
> I want to get random numbers from Gamma distribution, when I do
>
> rgamma(1.95, 2)
> [1] 2.313977
>
> but,
> rgamma(2, 2)
> [1] 2.7985347 0.9415515
>
> Why do I get two random numbers? It's the same density function, I don't
> see why the output should be a pair of numbers, is this explained in the
> documentation?
?rgamma
explains it all. First argument is n: number of observations. 1.95 is truncated.
Berend
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