On 01/10/2007 3:31 AM, Abu Naser wrote: > Hi all users, > > I want to calculate angles from two vector using quaternion. I believe , it > is possible using orientlib. Since > I am not an quaternion expart, I need assistance to make sure I am not doing > anything wrong. Could anyone please > expain it how to do it using orientlib.
> x <- quaternion(c(1,0,0,0)) > y <- quaternion(c(0,1,0,0)) > rotation.distance(x,y) [1] 3.141593 But this doesn't calculate angles between vectors, it calculates angles between orientations. See Murdoch, D. (2003). Orientlib: an R package for orientation data. Journal of Statistical Software, 8(19), 1-11. for details. Duncan Murdoch ______________________________________________ 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.
