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Re: 3D Scatter Plot [message #89369 is a reply to message #89368]

Thu, 28 August 2014 14:38

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

On 08/28/14 17:29, Paul van Delst wrote:
> On 08/27/14 18:40, sjone7 wrote:
>> How might one add error bars to a 3d scatter plot?
>
> How about plotting the data as semi-transparent orbs where the
> dimensions of the orbs represent the error bar extents?
>
> See David Fanning's example code at:
> http://www.idlcoyote.com/tip_examples/scatter_surface.pro
> The original article is at:
> http://www.idlcoyote.com/tips/scatter3d.html

I forgot to mention that you will have to define your own non-spherical
orb object (the one that comes with the IDL example code is spherical).

I guess it would be an "ellipsoid" object. Modifying the orb object
shouldn't be too hard (he says!) since it's the degenerate case where
the principal axes are all the same.

It will be a interesting programming exercise.

I wonder how fast it would render for, say, 10000 points?

cheers,

paulv

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[Message index]

		3D Scatter Plot By: aecorner on Thu, 06 April 2006 06:55
		Re: 3D Scatter Plot By: sjone7 on Wed, 27 August 2014 15:40
		Re: 3D Scatter Plot By: Paul Van Delst[1] on Thu, 28 August 2014 14:29
		Re: 3D Scatter Plot By: Paul Van Delst[1] on Thu, 28 August 2014 14:38
		Re: 3D Scatter Plot By: Jim Pendleton on Thu, 28 August 2014 20:39

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