Which line do you want? There's more than one choice. For example, you could regress y and z on x, or you could find the principle axis of the x, y, z point cloud.
Duncan Murdoch Thanks for the response. I need to find the principal axis for the point cloud. How can I plot this in R? Thanks a lot. -- View this message in context: http://n4.nabble.com/3d-trend-line-tp1053686p1100043.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
