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Commit 4172ff80 authored by actuaryzhang's avatar actuaryzhang Committed by Yanbo Liang
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[SPARK-18929][ML] Add Tweedie distribution in GLM 

## What changes were proposed in this pull request?
I propose to add the full Tweedie family into the GeneralizedLinearRegression model. The Tweedie family is characterized by a power variance function. Currently supported distributions such as Gaussian, Poisson and Gamma families are a special case of the Tweedie https://en.wikipedia.org/wiki/Tweedie_distribution.

yanboliang srowen sethah

Author: actuaryzhang <actuaryzhang10@gmail.com>
Author: Wayne Zhang <actuaryzhang10@gmail.com>

Closes #16344 from actuaryzhang/tweedie.
parent 90817a6c
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