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Re: 3D Scatter Plot [message #48218 is a reply to message #642]

Thu, 06 April 2006 07:12

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

aecorner@yahoo.com writes:

> I created a 3D scatter plot (long, lat, alt) for some satellite data
> (using the very helpful tips on David Fanning's website). A few
> questions...
>
> 1) Is there a way to fill in the symbols? This seems like it should
> be obvious.

Create a filled symbol and use that. Here, for example, is
how to create and use a filled circle:

phi = Findgen(32) * (!PI * 2 / 32.)
phi = [ phi, phi(0) ]
UserSym, Cos(phi), Sin(phi), /Fill
PLOTS, x, y, z, PSYM=8, COLOR=zcolors, SYMSIZE=2.5, /T3D

> 2) I need each point to be a different color based on it's Aerosol
> Optical Depth. I created an array of the color that each point needs
> to be. Can I set the COLOR keyword equal to this array in the PLOTS
> procedure to achieve that result?

A empirical exercise for the user. :-)

> 3) Is there a way to display a 3D plot on a map projection? The x and
> y axes are longitude and latitude and I would like to slip a map in
> horizontally along the bottom of the plot.

Yes, sort of. Set up your 3D coordinate space, then warp your
map projection into that space by setting the T3D keyword. But
you are pushing the limits of direct graphics. You might want to
make a foray into object graphics if you want to push this project
much further. It adds another order of magnitude in complexity,
but the results will be better, for sure.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		3d scatter plot By: li on Wed, 16 December 1992 17:17
		Re: 3D scatter plot By: landers on Tue, 25 May 1993 06:07
		Re: 3D scatter plot By: Bruce E Thomason on Thu, 13 June 1996 00:00
		Re: 3D scatter plot By: peter on Thu, 13 June 1996 00:00
		Re: 3D Scatter plot By: David Borland on Wed, 23 December 1998 00:00
		Re: 3D Scatter Plot By: David Fanning on Thu, 06 April 2006 13:27
		Re: 3D Scatter Plot By: aecorner on Thu, 06 April 2006 13:09
		Re: 3D Scatter Plot By: ChiChiRuiz@gmail.com on Thu, 06 April 2006 09:41
		Re: 3D Scatter Plot By: ChiChiRuiz@gmail.com on Thu, 06 April 2006 09:39
		Re: 3D Scatter Plot By: David Fanning on Thu, 06 April 2006 08:59
		Re: 3D Scatter Plot By: David Fanning on Thu, 06 April 2006 07:12

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