Re: [R] 3D trajectory plot?
Are you talking about a 'streamline' like might be made with 'vtk'? or in a number of fluid dynamics, groundwater packages, particle physics codes, etc.? There was an exploratory hook up of R and vtk by M. Kondrin a year or two back (linux only). Search the archives. Parsing a vtk dataset in R should relatively straight-forward. HTH Michael Grant --- On Tue, 11/11/08, Chris Jarman [EMAIL PROTECTED] wrote: From: Chris Jarman [EMAIL PROTECTED] Subject: [R] 3D trajectory plot? To: r-help@r-project.org Date: Tuesday, November 11, 2008, 9:55 PM Hello, I'm attempting to create a smooth, 3D plot of a trajectory (rather than the cloud or wireframe functions). I would rather the individual data points not be visible. I've had no luck finding this on the graphics or help pages. Thank you in advance. Chris Some example data, just in case: 2532 40 1225 32 2 12 25 2 2 12 202 2 1 20 2 6 1 20 5 6 1 5 5 6 __ 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.
Re: [R] 3D trajectory plot?
But it's not _smooth_ (as Chris asked for)... I also thought about the plot3d(), but I don't know how to smooth the 3D points. AFAIK spline functions only work for 2D cases in R? (Sorry I'm not familiar with splines) Regards, Yihui -- Yihui Xie [EMAIL PROTECTED] Phone: +86-(0)10-82509086 Fax: +86-(0)10-82509086 Mobile: +86-15810805877 Homepage: http://www.yihui.name School of Statistics, Room 1037, Mingde Main Building, Renmin University of China, Beijing, 100872, China On Wed, Nov 12, 2008 at 7:22 PM, Duncan Murdoch [EMAIL PROTECTED] wrote: Chris Jarman wrote: Hello, I'm attempting to create a smooth, 3D plot of a trajectory (rather than the cloud or wireframe functions). I would rather the individual data points not be visible. I've had no luck finding this on the graphics or help pages. Thank you in advance. Chris Some example data, just in case: 25 32 40 12 25 32 2 12 25 2 2 12 20 2 2 1 20 2 6 1 20 5 6 1 5 5 6 plot3d(x,y,z, type='l') from rgl. 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.
Re: [R] 3D trajectory plot?
In reading this thread the thought popped into my head. A smooth representation of the trajectory defined by the data in Chris's message from Wednesday is very similar to the guidance problem of a rocket. I believe that guidance engineers use Kalman filters to smooth out noisy data to generate the control signals to keep the missile on course. Would an such an approach work here to produce a smooth estimate to the trajectory described by the data? Clint Clint BowmanINTERNET: [EMAIL PROTECTED] Air Dispersion Modeler INTERNET: [EMAIL PROTECTED] Air Quality Program VOICE: (360) 407-6815 Department of Ecology FAX:(360) 407-7534 USPS: PO Box 47600, Olympia, WA 98504-7600 Parcels:300 Desmond Drive, Lacey, WA 98503-1274 On Fri, 14 Nov 2008, Duncan Murdoch wrote: On 14/11/2008 3:10 AM, Yihui Xie wrote: But it's not _smooth_ (as Chris asked for)... I also thought about the plot3d(), but I don't know how to smooth the 3D points. AFAIK spline functions only work for 2D cases in R? (Sorry I'm not familiar with splines) There are lots of definitions of smooth. One easy one is to use splines in each coordinate, with the independent variable being an implied time coordinate 1, 2, 3, etc. That is (with only the first 4 points, I'm lazy): x - splinefun(1:4, c(25,12,2,2)) y - splinefun(1:4, c(32,25,12,2)) z - splinefun(1:4, c(40,32,25,12)) times - seq(1, 4, len=200) plot3d(x(times), y(times), z(times), type=l) Duncan Murdoch Regards, Yihui -- Yihui Xie [EMAIL PROTECTED] Phone: +86-(0)10-82509086 Fax: +86-(0)10-82509086 Mobile: +86-15810805877 Homepage: http://www.yihui.name School of Statistics, Room 1037, Mingde Main Building, Renmin University of China, Beijing, 100872, China On Wed, Nov 12, 2008 at 7:22 PM, Duncan Murdoch [EMAIL PROTECTED] wrote: Chris Jarman wrote: Hello, I'm attempting to create a smooth, 3D plot of a trajectory (rather than the cloud or wireframe functions). I would rather the individual data points not be visible. I've had no luck finding this on the graphics or help pages. Thank you in advance. Chris Some example data, just in case: 25 32 40 12 25 32 2 12 25 2 2 12 20 2 2 1 20 2 6 1 20 5 6 1 5 5 6 plot3d(x,y,z, type='l') from rgl. 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. __ 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.
Re: [R] 3D trajectory plot?
Chris Jarman wrote: Hello, I'm attempting to create a smooth, 3D plot of a trajectory (rather than the cloud or wireframe functions). I would rather the individual data points not be visible. I've had no luck finding this on the graphics or help pages. Thank you in advance. Chris Some example data, just in case: 25 32 40 12 25 32 2 12 25 2 2 12 20 2 2 1 20 2 6 1 20 5 6 1 5 5 6 plot3d(x,y,z, type='l') from rgl. 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.
[R] 3D trajectory plot?
Hello, I'm attempting to create a smooth, 3D plot of a trajectory (rather than the cloud or wireframe functions). I would rather the individual data points not be visible. I've had no luck finding this on the graphics or help pages. Thank you in advance. Chris Some example data, just in case: 25 32 40 12 25 32 2 12 25 2 2 12 20 2 2 1 20 2 6 1 20 5 6 1 5 5 6 __ 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.
