# Mathematica Question **URL:** \ **Category:** Factual Questions\ **Created:** [April 17, 2002, 5:48am UTC](https://boards.straightdope.com/t/mathematica-question/104091 "2002-04-17T05:48:09Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Joey\_P](https://avatars.discourse-cdn.com/v4/letter/j/919ad9/32.png) [@Joey\_P](https://boards.straightdope.com/u/Joey_P)\ **Post date:** [April 17, 2002, 5:48am UTC](https://boards.straightdope.com/t/mathematica-question/104091/1 "2002-04-17T05:48:09Z")
If anyone know Mathematica I could use some help. I posted this question on the mathematica website forum but unlike this one, 6 hours later it’s still at the top of the list. So here’s what I’m trying to do. I have a set of data points in R^3, and a magnitude to go along with each one. For example pos={{1,2,3},{4,3,2},{7,12,4}} mag={{4},{2},{6}} I need to graph these. What would be perfect is a 4D Barchart, but that’s not gonna happen. What I want to do is use some sort of 3D graph and use colors to represent the different magnitudes. I have been experimenting with ListPlot3D, Plot3D, ScatterPlot3D … I can plot the points just fine, but when I try get the colors to work I end up with problems. Any help would be appriciated. Thanks The magnitude basically represents the frequency of each of the data points. Ideally I would use a four dimentional barchart. Actually, originally the magnitude was included in the first list. That is, each element of the first list contianed four data points ie pos={{1,2,3,4},{4,3,2,2},{7,12,4,6}} When I ran BarChart3D[pos], I got a very interesting looking bar chart, but I don’t think it really meant anything.