bandwidth.sj(x, nb=1000, lower, upper, method=c("ste", "dpi"), freq)
method = "ste".
"ste" ("solve-the-equation") or
"dpi" ("direct plug-in").
x, giving frequencies
(positive integers).
If supplied,
x is replaced with
rep(x, freq).
This function is based upon the function
width.SJ in Venables and
Ripley (1997).
Scott, D. W. (1992)
Multivariate Density Estimation: Theory, Practice, and Visualization.
Wiley.
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.
Venables, W. N. and Ripley, B. D. (1997)
Modern Applied Statistics with S-PLUS,
Second Edition.
Springer.
Wand, M. P. and Jones, M. C. (1995)
Kernel Smoothing.
Chapman & Hall.