[R] on using gam(gam)

[Liu Song]

Dear R users,

I am using R-function gam(gam) to fit additive models,
more specifically partially linear models.
Say, Y~x1+x2+s(z,df=d).
Is there a way to extract the smoother matrix for the smoothing term
z, or is there a way to extract the overall hat matrix H such that
Y_hat=HY.
Thank you in advance!

Sincerely,
Song
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Song Liu
School of Statistics
313 FordH
224 Church St. SE
Minneapolis,MN 55455