[R] Gamma count

Dan D ddalthorp at usgs.gov
Fri Sep 4 18:09:43 CEST 2015

Pick the mean (mu) and variance (sig2) you want. Then, shape = mu^2/sig2 and
scale = sig2/mu. This should work fine if your mean is large enough so that
p(x = 0 or 1) is small.

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