[R] 1 continuous non-normal variable ~ 4 factors + 1 continuous covariate (with interactions)

Dr. Pablo E. Verde PabloEmilio.Verde at uni-duesseldorf.de
Tue Apr 12 15:01:43 CEST 2011

> Im struggling on something... I have one continuous variable (A), and I 
> need
> to explain it with 4 factors, and maybe one continuous covariate.
> And of course, my variable A is not normal at all (it's a duration in
> seconds, whole numbers).
> What can I do? I would know how do deal with it if I had one factor, maybe
> two, but in that case Im really not sure what I am supposed to do to write 
> a
> model that is statistically correct.

If you are working with a positive outcome variable, one approach is to use 
glm( ..., family ="Gamma"),
other approach is to use survreg() in the package survival.



> Thanks,
> Al
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