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TRIPLOT: Stata module to generate triangular plots

Author

Listed:
  • Nicholas J. Cox

    () (University of Durham)

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.

Suggested Citation

  • Nicholas J. Cox, 1998. "TRIPLOT: Stata module to generate triangular plots," Statistical Software Components S342401, Boston College Department of Economics, revised 09 Feb 2009.
  • Handle: RePEc:boc:bocode:s342401
    Note: This module may be installed from within Stata by typing "ssc install triplot". Windows users should not attempt to download these files with a web browser.
    as

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    File URL: http://fmwww.bc.edu/repec/bocode/t/triplot.ado
    File Function: program code
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    File URL: http://fmwww.bc.edu/repec/bocode/t/triplot.hlp
    File Function: help file
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    File URL: http://fmwww.bc.edu/repec/bocode/t/triplot6.ado
    File Function: program code
    Download Restriction: no

    File URL: http://fmwww.bc.edu/repec/bocode/t/triplot6.hlp
    File Function: help file
    Download Restriction: no

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