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...ictors 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)+ + s(birth_year,by=wealth) + +...

...ion 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 appreciated. Thanks, Antonio Pedro [...

i know it''s probably really simple, how do i work out someone''s age if i have their d.o.b. stored as a date in my db. cheers -- Posted via http://www.ruby-forum.com/.