I am a new user of R. I am trying to fit gam model with our air pollution data. I used Foreign package to call data from SPSS and used MGCV package to fit gam. The following are the steps I used:
> dust<- read.spss("a:dust9600jan.sav")
> c<-gam(MRESPALL~s(DUSTM)+s(TEMP)+s(RH),family=poisson,data=dust)
> summary(c)

Family: poisson 
Link function: log 

Formula:
MRESPALL ~ s(DUSTM) + s(TEMP) + s(RH)

Parametric coefficients:
           Estimate  std. err.    t ratio    Pr(>|t|)
constant   -0.61508    0.03331     -18.47    < 2.22e-16

Approximate significance of smooth terms:
                edf       chi.sq     p-value
s(DUSTM)      6.605       16.738     0.01515
 s(TEMP)       2.47        5.253     0.10705
   s(RH)          1       1.5727     0.20981

R-sq.(adj) = 0.0202   Deviance explained = 2.35%
UBRE score = 0.0031294  Scale est. = 1         n = 1692


I would like to know the relative risk. I don't know the command. Please, can anybody help me to get the relative risk.
I will be grateful for the help.
Joseph E. Gomez

	[[alternative HTML version deleted]]


