Transcription of mgcv: GAMs in R
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mgcv: GAMs in R
Mgcv: GAMs in RSimon WoodMathematical Sciences, University of Bath, ,gamm4 mgcvis a package supplied with R for generalized additivemodelling, including generalized additive mixed models. The main GAM fitting routine isgam. bamprovides an alternative for very large datasets. The main GAMM fitting isgammwhich uses PQL based onpackagenlme. gamm4is an R package available , a version ofgammwhich useslme4forGAMM fitting, and avoids PQL. It is really an extensionpackage formgcv. The packages are loaded into R using (mgcv).mgcvhelp To get overview help ()within R andfollow thePackageslink tomgcv. The help pagemgcv-packageis a good page to start to getan overview. Note other overview pages such All user visible functions are documented.
"cr" a penalized cubic regression spline (”cc” for cyclic version). "ps" Eilers and Marx style P-splines (”cp” for cyclic). "ad" adaptive smoothers based on ”ps”. "tp" Optimal low rank approximation to thin plate spline, any dimension and permissable penalty order is possible. In addition the "re"class implements simple random effects.
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