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Re: 3D Plot Manipulation [message #20750 is a reply to message #20678]

Fri, 21 July 2000 00:00

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

"Mark Hadfield" <m.hadfield@niwa.cri.nz> wrote in message
news:964048678.156607@clam-ext...
> Re my previous post, I have tried a few different methods of representing
a
> 3-D cloud of points in object graphics--see the attached .pro file. Having
> one graphics atom per data point is terribly slow if the number of points
> exceeds a few hundred. The best method I have been able to come up with so
> far is to use a single text object with one string per data point. With
this
> method it's feasible to deal with a few thousand points.

I have now written an object specifically for this purpose. It's called an
MGHgrScatterPlot and it represents each data point as a polyline in the x-y
plane, with all the polylines bundled into a single IDLgrPolyline object.
Now I can plot over 10,000 data points reasonably quickly. See

http://katipo.niwa.cri.nz/~hadfield/gust/software/idl/mghgrs catterplot__defi
ne.pro
http://katipo.niwa.cri.nz/~hadfield/gust/software/idl/mgh_ex ample_scatter.pr
o

---
Mark Hadfield
m.hadfield@niwa.cri.nz http://katipo.niwa.cri.nz/~hadfield/
National Institute for Water and Atmospheric Research
PO Box 14-901, Wellington, New Zealand

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[Message index]

		3D Plot Manipulation By: Hugh Crowl on Wed, 19 July 2000 00:00
		Re: 3D Plot Manipulation By: Mark Hadfield on Fri, 21 July 2000 00:00
		Re: 3D Plot Manipulation By: Mark Hadfield on Fri, 21 July 2000 00:00
		Re: 3D Plot Manipulation By: Mark Hadfield on Thu, 20 July 2000 00:00
		Re: 3D Plot Manipulation By: promashkin on Wed, 19 July 2000 00:00
		Re: 3D Plot Manipulation By: promashkin on Wed, 19 July 2000 00:00

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