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Re: st: gamma


From   "JVerkuilen (Gmail)" <[email protected]>
To   [email protected]
Subject   Re: st: gamma
Date   Mon, 15 Oct 2012 08:46:10 -0400

On Mon, Oct 15, 2012 at 7:22 AM, David Hoaglin <[email protected]> wrote:
> Jason,
>
> digamma() is the first derivative of the gamma function, and
> trigamma() is the second derivative.

Tiny correction: They're the first logarithmic derivatives, so the
derivative of the log-gamma function.
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