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The calling sequence for lscv
matches those for the
locfit
or locfit.raw
functions.
Note that this function is only designed for density estimation
in one dimension. The returned object contains the
least squares cross validation score for the fit.
The computation of
lscv(x, ..., exact=FALSE)
A vector consisting of the LSCV statistic and fitted degrees of freedom.
model formula (or numeric vector, if exact=T
)
other arguments to locfit
or
lscv.exact
By default, the computation is approximate.
If exact=TRUE
, exact computation using
lscv.exact
is performed. This uses kernel density estimation
with a constant bandwidth.
locfit
,
locfit.raw
,
lscv.exact
lscvplot
# approximate calculation for a kernel density estimate
data(geyser, package="locfit")
lscv(~lp(geyser,h=1,deg=0), ev=lfgrid(100,ll=1,ur=6), kern="gauss")
# same computation, exact
lscv(lp(geyser,h=1),exact=TRUE)
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