Scott, This is a good explanation and a good practice.
Thank you, John --- On Thu, 4/8/10, Waichler, Scott R <scott.waich...@pnl.gov> wrote: > From: Waichler, Scott R <scott.waich...@pnl.gov> > Subject: Re: 3-D response surface using wireframe() > To: "arrayprof...@yahoo.com" <arrayprof...@yahoo.com> > Cc: "r-help@r-project.org" <r-help@r-project.org> > Date: Thursday, April 8, 2010, 9:51 AM > Regarding the screen argument in > wireframe(), here is what I understand about how it works > after much trial-and-error: > > After each rotation, new axes are in effect defined for the > next rotation as at the start: x is to the right of > the 2D view, y is towards the top, and z is positive out of > the page towards you. Understanding this "reset" of > coordinate system after each rotation is key to > understanding how the sequence of rotations will be > done. Rotations follow the right-hand rule: > positive angles follow curved fingers of right hand, with > thumb pointing in positive direction of associated axis. > > I labeled a wooden block with axes and turned it in my hand > to help me make the initial guess at the sequence of > rotations I would want for a given view. > > Scott Waichler > Pacific Northwest National Laboratory > P.O. Box 999, Richland, WA 99352 > scott.waich...@pnl.gov > 509-372-4423, 509-341-4051 (cell) > > > ______________________________________________ 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.
