Implement the Gamma Distribution. #161
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This change implements the gamma distribution, now that it's possible to have a more precise calculation of the regularised lower incomplete gamma function (called `normalised_lower_incomplete_gamma_function`).
shamangeorge
approved these changes
Jan 16, 2025
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Description
This PR implements the Gamma Distribution now that we have available a relatively good implementation of the regularised lower incomplete gamma function.
This implementation has the notion of
rate, so when you initialise the class distribution without specifying thescale:parameter, it will default to a rate function withrate: 1/shape. Keep in mind that this will affect all calculations made.The following functions are availble:
#as_rate?)#density_function)#cumulative_function)#mean)#mode)#variance)#skewness)