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4 results for “from:Liu Song”

on using gam(gam)
Liu Song · Apr 17, 2006 · r-help

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...

R: On using gam(gam).
Liu Song · Apr 14, 2006 · r-help

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...

need help on GAM
Liu Song · Oct 12, 2004 · r-help

Get some question about the function "gam". Suppose I have a semiparametric model, Y~x1+x2+s(z1). Using "gam", how could I get the estimates for the parametric part and nonparametric part respectively? And another question: we could find...

as.formula and lme ( Fixed effects: Error in as.vector(x, "list") : cannot coerce to vector)
Liu Song · Aug 12, 2005 · r-help

This is a continuing issue with the one on the list a long time ago (I couldn't find a solution to it from the web): -------------------------------------------------------------------------- > Using a formula converted with as.formula with lme leads > to an error message...

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