On 10/1/2007 11:09 AM, Abu Naser wrote: > Hi Duncan, > Sorry, I forgot to mention. I meant (x1,y1,z1) and (x3,y3,z3).
I'm afraid I still don't understand what angle you are trying to calculate. Duncan Murdoch > > With regards, > Abu > > ----------------------------------------> Date: Mon, 1 Oct 2007 10:48:12 > -0400> From: [EMAIL PROTECTED]> To: [EMAIL PROTECTED]> CC: > r-help@r-project.org> Subject: Re: [R] orientlib>> On 10/1/2007 9:44 AM, Abu > Naser wrote:>> Hi Duncan,>>>> Thanks for your replay.>> I am confused as I > dont have the quaternion backgorund.>>>> Let me explain what I am trying to > do:>> I have 3 coordinates in space (x1,y1,z1),(x2,y2,z2), and (x3,y3,z3) . > Now, I use (x1,y1,z1) and (x2,y2,z2) to define axis of rotaion. Then, I > wanted to use 3rd coordinate to calculate angle of rotation about that axis. > Is it possible with your orientlib?>> I think you need to be more specific > about how the rotation is defined.> Two points define a line in an obvious > way, but how does the third point> define an angle?>> Duncan Murdoch > > _________________________________________________________________ > Get free emoticon packs and customisation from Windows Live. > > ______________________________________________ > 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.
