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digamma function

To: s-news <s-news@lists.biostat.wustl.edu>
Subject: digamma function
From: Olivier Martin <olivier.martin@inrialpes.fr>
Date: Wed, 21 Feb 2001 19:28:53 +0100
Dear s-plus users,

I don't find the digamma function  digamma(x) = d/dx {ln Gamma(x)} = Gamma'(x) / Gamma(x)
in Splus, but it is available in R.
So is there a way to find out if it is available somwhere or to develop it.
Thanks
 

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