MathGroup Archive 1996

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Re: Trilinear plots



At 3:55 Uhr 22.08.1996, Xah Lee wrote:
>At 5:15 AM 96/8/16, Michael Friendly wrote:
>>I'm looking for ideas on how to do trilinear plots, ie, plots
>>on three axes which form an equilateral triangle (where the three coords are
>>usually scaled so they sum to 1 for each observation)?
>>
>>Equivalently, this plot can be described as a plot of the locations of 3D
>>points in the plane defined by x+y+z=1.
>
>Holy cow! This seems very interesting. Just for the curiosity of how
>functions would appear as such plot, I might be interested to write a
>package for it, with user specifying arbitrary number of axes and slant.
>
>Can anyone give me some information about such plot? Such as more detailed
>description, its use?


This kind of plots are often used in geography, geochemistry to visualize
data of different fields. Because my wife teaches geography, I have seen
them before.

Examples:
Part of Soil: sand, clay, Schluff (German word)
Part of BIP for different countries: agriculture, industry, tertiar sector
Part of people working in agriculture, industry, service for different
sized communities

I have an article, written in German, how to use such plots. If I can help
you let me know.

Guenther

--------------------------
Guenther Gsaller
guenther.gsaller at ivnet.co.at
--------------------------



==== [MESSAGE SEPARATOR] ====


  • Prev by Date: Re: fitting differential eq. to data
  • Next by Date: Re: do we need to be moderated? Re: Piecewise Functions
  • Previous by thread: RE: Trilinear plots
  • Next by thread: loglistplot doesn't work on windows nt 3.51 MMA 2.2