hatmatrix {locfit}  R Documentation 
hatmatrix()
computes the weight diagrams (also known as
equivalent or effective kernels) for a local regression smooth.
Essentially, hatmatrix()
is a frontend to locfit()
,
setting a flag to compute and return weight diagrams, rather than the
fit.
hatmatrix(formula, dc, ...)
formula 
model formula. 
dc 
Derivative adjustment (to be passed to locfit.raw . 
... 
Other arguments to locfit and
locfit.raw .

A matrix with n rows and p columns; each column being the
weight diagram for the corresponding locfit
fit point.
If ev="data"
, this is the transpose of the hat matrix.
locfit
, plot.locfit.1d
, plot.locfit.2d
,
plot.locfit.3d
, lines.locfit
, predict.locfit