That's interesting. You might also like: http://en.wikipedia.org/wiki/Von_Mises%E2%80%93Fisher_distribution
I'm not sure how to plot the wireframe sphere, but you can visualize the points by transforming to Cartesian coordinates like so: u <- runif(1000,0,1) v <- runif(1000,0,1) theta <- 2 * pi * u phi <- acos(2 * v - 1) x <- sin(theta) * cos(phi) y <- sin(theta) * sin(phi) z <- cos(theta) library("lattice") cloud(z ~ x + y) -Matt On Fri, 2011-02-25 at 14:21 +0100, Lorenzo Isella wrote: > Dear All, > I need to plot some points on the surface of a sphere, but I am not sure > about how to proceed to achieve this in R (or if it is suitable for this > at all). > In any case, I am not looking for really fancy visualizations; for > instance you can consider the images between formulae 5 and 6 at > > http://bit.ly/hOgK9h > > Any suggestion is appreciated. > Cheers > > Lorenzo > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.