-------- Original Message -------- Subject: Re: R with 3D? Date: Wed, 13 May 2009 04:38:42 -0700 (PDT) From: Joseph Kunkel <[email protected]> To: [email protected] CC: Joseph Kunkel <[email protected]> References: <[email protected]> Abby, I think I understand your problem. That is why I chose the Microscribe digitizer that would allow a definitive choice of a specific xyz location by the stylus point. I trust my eyes using magnifying glasses to choose a 3-D point in real-time-color than the monochrome digitizer landscape. But your laser cloud should be ordered into scan lines, yes? I would write an R-script that could have the three alternate 2-D views of the locale to be seen simultaneously and then use the mouse functions to chose two or three of the best coordinate pairs and some averaging function allow that guess of where the landmark is to be calculated and viewed in another window in rgl. It might also allow interpolating between nearest scan points. Good luck. I for one would like to see such a library function available since it might make laser scanning more attractive to me. Joe Kunkel [email protected] On May 13, 2009, at 3:07 AM, morphmet wrote:
-------- Original Message -------- Subject: R with 3D? Date: Tue, 12 May 2009 12:31:42 -0700 (PDT) From: Abby Drake <[email protected]> To: [email protected] Any R experts out there? I want to capture landmarks and eventually semilandmarks off my 3D point cloud data obtained from laser scans. I picked up the Morphometrics with R book and have found both the book and R very easy to use. However the 'locator' function used for capturing the landmarks in 2D does not seem to work in any of the 3D plotting packages. I tried scatterplot3d, cloud and now rgl. rgl is great because it lets you rotate and zoom with the mouse. Is there a function I'm missing that will also let me select landmarks like 'locator' does for 2D? Thanks for your help! Abby -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
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Joseph G. Kunkel, Professor Biology Department University of Massachusetts Amherst Amherst MA 01003 http://www.bio.umass.edu/biology/kunkel/ -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
