oldlogspline.to.logspline {logspline}

Logspline Density Estimation - 1992 to 1997 version

Description

Translates an oldlogspline object in an logspline object. This routine is mostly used in logspline, as it allows the routine to use oldlogspline for some situations where logspline crashes. The other use is when you have censored data, and thus have to use oldlogspline to fit, but wish to use the auxiliary routines from logspline.

Usage

oldlogspline.to.logspline(obj, data) 

Arguments

obj

object of class logspline

data

the original data. Used to compute the range component of the new object. if data is not available, the 1/(n+1) and n/(n+1) quantiles of the fitted distribution are used for range.

Value

object of the class logspline. The call component of the new object is not useful. The delete component of the old object is ignored.

Author(s)

Charles Kooperberg [e-mail].

References

Charles Kooperberg and Charles J. Stone. Logspline density estimation for censored data (1992). Journal of Computational and Graphical Statistics, 1, 301–328.

Charles J. Stone, Mark Hansen, Charles Kooperberg, and Young K. Truong. The use of polynomial splines and their tensor products in extended linear modeling (with discussion) (1997). Annals of Statistics, 25, 1371–1470.

See Also

logspline, oldlogspline.

Examples

x <- rnorm(100)
fit.old <- oldlogspline(x)
fit.translate <- oldlogspline.to.logspline(fit.old,x)
fit.new <- logspline(x)
plot(fit.new)
plot(fit.old,add=TRUE,col=2)
#
# should look almost the same, the differences are the
# different fitting routines
#