Hi, In src/nmath/dgamma.c the comment at the top says
* DESCRIPTION * * Computes the density of the gamma distribution, * * 1/s (x/s)^{a-1} exp(-x/s) * p(x;a,s) = ----------------------- * (a-1)! * * where `s' is the scale (= 1/lambda in other parametrizations) * and `a' is the shape parameter ( = alpha in other contexts). Maybe I'm missing something, but shouldn't the denominator be Gamma(a) (since a is not necessarily an integer)? Faheem. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html