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MathGroup Archive 1998

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Re: Plotting (x,y,z) style data

  • To: mathgroup at
  • Subject: [mg14168] Re: Plotting (x,y,z) style data
  • From: Paul Abbott <paul at>
  • Date: Wed, 30 Sep 1998 02:04:17 -0400
  • Organization: University of Western Australia
  • References: <6ud2hd$>
  • Sender: owner-wri-mathgroup at

Emma.Gottesman at wrote:

> I have a set of data (z) which is dependant on two variables (x and y).
> x and y are not linearly spaced, for instance the values for x are
> 1,5,15,20,25,30
> and the values of y are
> 2.8265,  6.0901,  8.4037,  9.7438, 15.4105, 16.2210, 18.0747, 27.0028,
> 32.9710, 33.4117, 36.8778, 47.0123, 47.1012,  64.0642,  64.8562,
> 66.9691, 70.2852, 85.6802,  89.2302, 93.1160
> I've currently got the data in the form of a list of triples i.e. {
> {x1,y1,z1},{x2,y2,z2} .....}
> I'm trying to fit a model to this data, and as part of that I'd like to
> plot it.
>  What's the best way of plotting this type of 3D data in Mathematica
> (note: I'm a bit of a Mathematica novice).

Have a look at the functions in the DiscreteMath`ComputationalGeometry`
package which is included with version 3.0.

Also, the book "Mathematica Graphics" by Tom Wickham-Jones includes code
for triangular interpolation which generates a function for
approximating irregular data.  The packages are available from
MathSource at


Paul Abbott                                   Phone: +61-8-9380-2734
Department of Physics                           Fax: +61-8-9380-1014
The University of Western Australia            Nedlands WA  6907       
mailto:paul at  AUSTRALIA              

            God IS a weakly left-handed dice player

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