Hi!


I have fitted two glms assuming a poisson distribution which are:

fit1 <- glm(Aids ~ Year, data=aids, family=poisson())

fit2 <- glm(Aids ~ Year+I(Year^2), data=aids, family=poisson())


I am trying to work out how to represent the fitted regression curves of fit1 and fit2 on the one graph. I have tried:

graphics.off()

plot(Aids ~ Year, data = aids)


line(glm(Aids ~ Year, data=aids, family=poisson()))
line(glm(Aids ~ Year+I(Year^2), data=aids, family=poisson()))

but this does not work.

Can anyone help me?

Thanks

Jo

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