[R] 3D plot of a bivariate normal distribution

Hi, I've used the Mathematica to produce 3D graphics, contour plots of a bivariate normal distribution Now I want make these graphics in R, but i do not know how. I would like to: - Plot a 3D graph for some different variance matrix - Plot the contour plots - Find and try to plot (in the 3d graph

[R] robust regression

Is there a command in R that make the same regression like l1fit in S-plus? -- [EMAIL PROTECTED] -- __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help

[R] rigde regression and influence measures

I make a regression using the lm.rigde function from library MASS. Now i want some measures of influence. Is there a way to use a lm.ridge object into the function influence.measures? -- [EMAIL PROTECTED] -- __ [EMAIL PROTECTED] mailing list http

[R] estimating a density by selecting the bandwidth

I´ve a data set and i want fit a kernel density estimate to the data. but using the k-nearest neighbour method. How i do this with R. thanks -- [EMAIL PROTECTED] -- __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/

[R] compose a name in function

I write a function to plot some graphs and a gave for it one result of lm() (reg) and a character (name). In win.metafile("name-%02d.wmf", pointsize = 14) i want compose de name of file with the string i pass to the function. How i can make this? plota.res.grava <- function(reg,name){ win.me

[R] nonparametrics databank for analisys

t have to use a databank and present analisys. So, if somebody give me indications where i can find databanks for nonparametric statistics analisys (on the internet or other sources), i will thank you. Rafael Bertola Unicamp www.ime.unicamp.br [