Message-ID: <AANLkTim8+ZFKisN-7beV17TezV3DwMEf-FxceEwq0XaY@mail.gmail.com>
Date: 2011-02-09T15:23:27Z
From: Chuse chuse
Subject: precision of gamma function
Dear R users,
I have to calculate gamma functions for negative numbers beyond -171.4.
e.x. gamma(-500.4)
I got following:
> gamma(-170.4)
[1] -5.824625e-308
> gamma(-171.4)
[1] 0
Warning message:
underflow occurred in 'gammafn'
I have tried to use a recursion getting values a little futher -180.
How could I solve this problem? Thank you beforehand.
Chuse.