[R] Trigamma function

Feng Zhang f0z6305 at labs.tamu.edu
Thu Oct 17 03:28:12 CEST 2002

Hey, all

Do you how to calculate the trigamma function, that is
d**2(log(gamma(x))) / dx**2.
The second-order derivative of log(Gamma(x))?

I cannot find it in the R package, and somebody knows who or where to get
such one?



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