Hello,

I have count data with a large number of zeros. To model this data using
gams I want to try the Tweedie distribution instead. (The zero-inflated
poisson willbe my next step)

How do i decide on the value of the power 'p' parameter in the formula:
family=Tweedie(p, link) ? For a glm, this can be found using the
tweedie.profile function. But it doesnot work with the gam model formula
where explantory variables are specified as s(x1) instead of x1.

Will using a tweedie on discrete data affect my results?

If my question has already been addressed before, a reference to the
relevant information will be very much appreciated.

Thanks,
payal.

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