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October 09, 2014


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Another package to add to your list, and one which comes with R; mgcv. For a while mgcv has has a Tweedie family for use in `gam()` etc., but you had to set the power parameter p and hence optimise over a range of values p by hand. Since version 1.8.0, mgcv has included a new tw family function which treats p as just another model parameter to be included in the model and optimised for.

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