[R] how to avoid this : underflow occurred in 'lgammacor'

[casperyc]

Hi all,

I am constructing a likelihood involving the following

lbeta(j + a, k - j + b)

where j,k are constants and a and b are parameters (>0).

While doing the optimization, the error sometimes occurs,

In lbeta(j + a, k - j + b) : underflow occurred in 'lgammacor'

Is there a way to avoid it?

I am not sure what's being used in ' 'lgammacor''.

Thanks!

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PhD candidate in Statistics
School of Mathematics, Statistics and Actuarial Science, University of Kent
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