[R] Help with gam

Uwe Ligges
Wed, 11 May 2011 17:08:38 -0000

On 11.05.2011 17:22, Zsolt Macskasi wrote:
> Hi,
>
> I am a brand new user of R and I am trying to use the gam procedure with
the package mgcv. I did a bit of my homework by consulting the R-manual, as well
as the mgcv manual written by Simon Wood. I admit it was just a few hours, but
what I am trying to do is really basic. Essentially, what I am trying to do is
to generate the fitted values after the execution of the gam procedure and
export them into Excel.
>
> Here is my program:
>
> ABC<- read.table("Incidence Data.csv", header=TRUE,
sep=",")

probably the next three lines can be omitted if you just say:

fit <- gam(incidence~te(age,birthyear), data=ABC, family=poisson, fit=TRUE)


> incidence<- ABC[,1]
> age<- ABC[,2]
> birthyear<- ABC[,3]
> fit<-gam(incidence~te(age,birthyear), family=poisson, fit=TRUE)

>
> All this works. Now, how can I see the fitted values and copy them back to
Excel?


As for most fitted models, you can get

Fitted values:

   predict(fit)

Coefficients:

  coef(fit)

etc.


Uwe Ligges



> Thank you very much,
>
> Zsolt
>
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>
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