The plots are a set of graphs which are common to the regression
models implemented in the function regFit. This includes
linear regression models use="lm",
robust linear regression models use="rlm",
generalized linear regression models use = "glm",
generalized additive regression models use = "gam",
projection pursuit regression models use = "ppr",
neural network regression models use = "nnet", and
polychotomous MARS models use = "polymars".
In addition one can also use the original plot functions of the
original models, .e.g. plot(slot(object, "fit").