width.SJ(x, nb = 1000, lower, upper, method = c("ste", "dpi"))
method = "ste"
.
"ste"
("solve-the-equation") or
"dpi"
("direct plug-in").
Sheather, S. J. and Jones, M. C. (1991) A reliable data-based bandwidth
selection method for kernel density estimation.
Journal of the Royal Statistical Society series B
53, 683-690.
Scott, D. W. (1992)
Multivariate Density Estimation: Theory, Practice, and Visualization.
Wiley.
Wand, M. P. and Jones, M. C. (1995)
Kernel Smoothing.
Chapman & Hall.
attach(geyser) width.SJ(duration, method="dpi") width.SJ(duration) detach() width.SJ(galaxies, method="dpi") width.SJ(galaxies)