Auxiliary function as user interface for 'gam' fitting. Lists what smoothers are implemented, and allows users to include new smoothers.
gam.smoothers(slist = c("s", "lo", "random"), wlist = c("s", "lo"))
character vector giving names of smoothers available for general backfitting. For every entry, eg "lo", there must exist a formula function "lo()" that prepares the data, and a fitting function with the name "gam.lo" which actually does the fitting. Look at "lo" and "s" as examples.
character vector (subset of slist) giving names of smoothers for which a special backfitting algorithm is available, when only that smoother appears (multiple times) in the formula, along with other non smooth terms.
a list is returned, consisting of the two named vectors. If the function is called with no arguments, it gets the version of "gam.smooth.list"' in the search path, by default from the package name space. Once it is called with either of the arguments, it places a local copy in the users namespace.
Hastie, T. J. (1992) Generalized additive models. Chapter 7 of Statistical Models in S eds J. M. Chambers and T. J. Hastie, Wadsworth & Brooks/Cole.
## Not run: gam.smoothers()$slist # get the gam.smooth.list, and extract component slist ## Not run: gam.smoothers(slist=c("s","lo","random","tps") # add a new smoother "tps" to the list
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