preplot.locfit.raw is an internal function used by
  predict.locfit and preplot.locfit.
  It should not normally be called directly.
# S3 method for locfit.raw
preplot(object, newdata, where, what, band, ...)A list containing raw output from the internal prediction routines.
Fitted object from locfit().
New data points.
Type of data provided in newdata.
What to compute predicted values of.
Compute standard errors for the fit and include confidence bands on the returned object.
Arguments passed to and from other methods.
locfit, predict.locfit, preplot.locfit.