Preplot for a GAM Object
USAGE: 
preplot.gam(object, newdata, terms)

This is a method for the function preplot for objects inheriting from class gam. See preplot for the general behavior of this function and for the interpretation of newdata.

terms:
a character vector of term labels; default is labels(object).
VALUE:
A list of evaluated terms is returned, each of which is also a preplot.gam object. These each contain components x, y, xlab ylab and others that are used in plotting the term. plot.gam creates a preplot.gam object prior to plotting; if one of the components of a gam object is called preplot, it is assumed to be a preplot.gam object and is used directly.
SEE ALSO:
plot.preplot.gam .
EXAMPLES: 
plot.object <- preplot(gam.object)
plot(preplot.object, se = T)
gam.object$preplot <- preplot(gam.object)
plot(gam.object)   # preplot.gam is not called again