scb {locfit}R Documentation

Simultaneous Confidence Bands


scb is implemented as a front-end to locfit, to compute simultaneous confidence bands using the tube formula method and extensions, based on Sun and Loader (1994).

Some examples can also be found at


scb(x, ..., type=1)


x A numeric vector or matrix of predictors (as in locfit.raw), or a model formula (as in locfit).
... Additional arguments to locfit.raw; e.g., mg, flim, etc.
type Type of confidence bands. type=0 computes pointwise 95% bands. type=1 computes basic simultaneous bands with no corrections. type=2,3,4 are the centered and corrected bands for parametric regression models listed in Table 3 of Sun, Loader and McCormick (2000).


A list containing the evaluation points, fit, standard deviations and upper and lower confidence bounds. The class is "scb"; methods for printing and ploting are provided.


Sun J. and Loader, C. (1994). Simultaneous confidence bands in linear regression and smoothing. The Annals of Statistics 22, 1328-1345.

Sun, J., Loader, C. and McCormick, W. (2000). Confidence bands in generalized linear models. The Annals of Statistics 28, 429-460.

See Also



# corrected confidence bands for a linear logistic model
fit <- scb(deaths ~ lconc, type=4, w=nins, data=insect,
   deg=1, family="binomial", kern="parm")

[Package locfit version 1.1-9 Index]