Re: Visualization of a list of 3D points coordinates with a perspective

• To: mathgroup at smc.vnet.net
• Subject: [mg89307] Re: Visualization of a list of 3D points coordinates with a perspective
• From: dh <dh at metrohm.ch>
• Date: Thu, 5 Jun 2008 00:42:37 -0400 (EDT)
• References: <g25nta\$hu5\$1@smc.vnet.net>

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Hi Alexei,

simply create a sphere with a suitable size at your data points.E.g.:

lst={{3.30414,-2.86064,-2.54648},{4.06572,3.80403,1.68897},{-1.72822,-2.03097,-4.1024}};

Show[Graphics3D[Sphere[#,1/#[[2]]]&/@lst],Axes->True]

hope this helps, Daniel

Alexei Boulbitch wrote:

> Dear MathGroup members,

>

> I have a list containing 3D coordinates of a number of points, like this one

> lst={{3.30414, -2.86064, -2.54648}, {4.06572, 3.80403,

>    1.68897}, {-1.72822, -2.03097, -4.1024}, ...}

>

> I would like to visualize them by plotting them. To plot them as a set

> of points may be trivially done by say, ListPointPlot3D. Alternatively,

> it may be visualized as a set of spheres with unit radius and centered

> in the points specified by the list, e.g. in the point {3.30414,

> -2.86064, -2.54648}, in {4.06572, 3.80403, 1.68897} etc.

>

> Now comes the question. I would like to do it in such a way that the

> size (and may be the color) of each point or sphere would depend upon

> one of the coordinates (say, y). In other words, the size and the of the

> first point specified by lst with y=-2.86064 would be smaller than that

> of the second point that has y=3.80403. The color or darkness may also

> depend upon y. This would give a feeling of a perspective.

>

> Do you have an idea of how to do this?

>

> Best, Alexei

>

--

Daniel Huber

Metrohm Ltd.

Oberdorfstr. 68

CH-9100 Herisau

Tel. +41 71 353 8585, Fax +41 71 353 8907

E-Mail:<mailto:dh at metrohm.com>

Internet:<http://www.metrohm.com>

```

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