Displaying 2 results from an estimated 2 matches for "maternal_age_c".
2013 Mar 26
2
GAM model with interactions between continuous variables and factors
...ot sure how to handle interactions with categorical predictors in the
GAM models. For example what is the different between these bellow two
models. Tests are indicating that they are different but their predictions
are essentially the same.
Thanks a bunch,
> gam.1 <- gam(mortality.under.2~ maternal_age_c+ I(maternal_age_c^2)+
+ s(birth_year,by=wealth) +
+ + wealth + sex +
+ residence+ maternal_educ + birth_order,
+ ,data=rwanda2,family="binomial")
>
> gam.2 <- gam(mortality.under.2~ maternal_age_c+ I(maternal_age_c^2)+
+...
2013 Mar 23
1
Time trends with GAM
...ce one knot to be at a
particular location while letting the model to find the other knots?
2) how can I extract the matrix from the fitted GAM so that I can use it in
as an impute for a different model.
The types of models I am running are to the following form:
gam <- gam(mortality.under.2~ maternal_age_c+ I(maternal_age_c^2)+
s(birth_year,by=wealth2) +
+ wealth2 + sex +
residence+ maternal_educ + birth_order,
,data=colombia2,family="binomial")
I've read the extensive documentation for the GAM but I am not sure still.
Any suggestion is really appre...