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>

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>