Hi, Can anyone guide me as to how I can add points to a p3d() plot from the onion package?? I want to plot points with different colors on the same 3D plot.? Perhaps I can do this without adding points but somehow directing the 'h' parameter to give different color to points based on a factor I assign to them? FYI, I can do this using using scatterplot3d() and points3d(), but these plots lack perspective and hence it is hard to sense depth without the use of color. Thanks, Brad
add points to 3D plot using p3d {onion}
4 messages · Bradley Christoffersen, robin hankin, Viechtbauer Wolfgang (STAT) +1 more
Hello Bradley I don't think there's an easy way to do what you want because the viewing angles are internal to p3d(). Frankly p3d() tries to be all things to all men (the arguments are a mess) and inevitably isn't as flexible as one might wish. I take it you want to do this: data(bunny) p3d(head(bunny,100),d0=2,theta=3) points(tail(bunny), col='blue') You'd want the call to points() to "remember" theta=3, and possibly d0=2 as well. Although I can see a hack.... I'd be very happy to help you offline. best wishes Robin
Bradley Christoffersen wrote:
Hi, Can anyone guide me as to how I can add points to a p3d() plot from the onion package? I want to plot points with different colors on the same 3D plot. Perhaps I can do this without adding points but somehow directing the 'h' parameter to give different color to points based on a factor I assign to them? FYI, I can do this using using scatterplot3d() and points3d(), but these plots lack perspective and hence it is hard to sense depth without the use of color. Thanks, Brad
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Robin K. S. Hankin Uncertainty Analyst University of Cambridge 19 Silver Street Cambridge CB3 9EP 01223-764877
Just as an aside, the scatterplot3d package does things like this very cleverly. Essentially, when you create a plot with scatterplot3d, the function actually returns functions with values set so that points3d(), for example, "knows" the axis scaling. Best, -- Wolfgang Viechtbauer http://www.wvbauer.com/ Department of Methodology and Statistics Tel: +31 (43) 388-2277 School for Public Health and Primary Care Office Location: Maastricht University, P.O. Box 616 Room B2.01 (second floor) 6200 MD Maastricht, The Netherlands Debyeplein 1 (Randwyck) ----Original Message---- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Robin Hankin Sent: Wednesday, January 27, 2010 11:17 To: Bradley Christoffersen Cc: r-help at r-project.org Subject: Re: [R] add points to 3D plot using p3d {onion}
Hello Bradley I don't think there's an easy way to do what you want because the viewing angles are internal to p3d(). Frankly p3d() tries to be all things to all men (the arguments are a mess) and inevitably isn't as flexible as one might wish. I take it you want to do this: data(bunny) p3d(head(bunny,100),d0=2,theta=3) points(tail(bunny), col='blue') You'd want the call to points() to "remember" theta=3, and possibly d0=2 as well. Although I can see a hack.... I'd be very happy to help you offline. best wishes Robin Bradley Christoffersen wrote:
Hi, Can anyone guide me as to how I can add points to a p3d() plot from the onion package? I want to plot points with different colors on the same 3D plot. Perhaps I can do this without adding points but somehow directing the 'h' parameter to give different color to points based on a factor I assign to them? FYI, I can do this using using scatterplot3d() and points3d(), but these plots lack perspective and hence it is hard to sense depth without the use of color. Thanks, Brad
On 27.01.2010 17:50, Viechtbauer Wolfgang (STAT) wrote:
Just as an aside, the scatterplot3d package does things like this very cleverly. Essentially, when you create a plot with scatterplot3d, the function actually returns functions with values set so that points3d(), for example, "knows" the axis scaling.
Right, it makes use of lexical scoping properties, where the environment is attached to the returned graphics functions. Uwe Ligges
Best,