apache / commons-rng / 407

98%

master: 100%

Pull #39

travis-ci

RNG-96: Fix parameter interpretation in the AhrensDieterMarsagliaTsangGammaSampler.

This modifies the algorithm so that alpha is interpreted as a 'shape'
parameter and theta is a 'scale' parameter. This effectively reverses
the function of the parameters (alpha => theta and theta => alpha). The
algorithm parameter names match those defined on MathWorld and
Wikipedia. The sampler output matches the reference definition in the
tests when the same parameters for shape and scale are used.

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