On 09/02/2011 10:23 AM, Chuse chuse wrote:
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.
Use the lgamma function.
Duncan Murdoch
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