Fractional package:random-fu

fractionalBeta :: (Fractional a, Eq a, Distribution Gamma a, Distribution StdUniform a) => a -> a -> RVarT m a
random-fu Data.Random.Distribution.Beta
fractionalDirichlet :: (Fractional a, Distribution Gamma a) => [a] -> RVarT m [a]
random-fu Data.Random.Distribution.Dirichlet
fractionalPoisson :: (Num a, Distribution (Poisson b) Integer) => b -> RVarT m a
random-fu Data.Random.Distribution.Poisson
fractionalPoissonCDF :: (CDF (Poisson b) Integer, RealFrac a) => b -> a -> Double
random-fu Data.Random.Distribution.Poisson
fractionalPoissonPDF :: (PDF (Poisson b) Integer, RealFrac a) => b -> a -> Double
random-fu Data.Random.Distribution.Poisson
fractionalStdSimplex :: (Ord a, Fractional a, Distribution StdUniform a) => Int -> RVar [a]
random-fu Data.Random.Distribution.Simplex
An algorithm proposed by Rubinstein & Melamed (1998). See, e.g., S. Onn, I. Weissman. Generating uniform random vectors over a simplex with implications to the volume of a certain polytope and to multivariate extremes. Ann Oper Res (2011) 189:331-342.