TRIPLOT: Stata module to generate triangular plots

Nicholas Cox

Statistical Software Components from Boston College Department of Economics

Abstract: triplot produces a triangular plot of the three variables leftvar, rightvar and botvar, which are plotted on the left, right and bottom sides of an equilateral triangle. Each should have values between 0 and some maximum value (default 1) and the sum of the three variables should be equal to that maximum (within rounding error). Most commonly, three fractions or proportions add to 1, or three percents add to 100. The constraint that the three variables have a constant sum means that there are just two independent pieces of information. Hence it is possible to plot observations in two dimensions. Triangular plots appear under various names in the literature, including trilinear, triaxial, three-element maps, ternary, reference triangles, percentage triangles, mixture, facies, barycentric. This is version 2.2.0 of the software written for Stata 8. The previous version, written for Stata 6, is also included as triplot6.

Language: Stata
Requires: Stata version 9.0 (6.0 for triplot6)
Keywords: graphics; triangular plots; trilinear plots; ternary plots; triaxial plots (search for similar items in EconPapers)
Date: 1998-05-04, Revised 2009-02-09
Note: This module may be installed from within Stata by typing "ssc install triplot". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/t/triplot.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/t/triplot.hlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/t/triplot6.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/t/triplot6.hlp help file (text/plain)

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