Thanks as ever to KitBaum the triplot package has been updated on SSC. Kit reminded me that the module there was first posted in 1998, but the last update was in 2009:
https://www.stata.com/statalist/arch.../msg00126.html
The package has triplot as main command with triplot6 as an extra museum item. It is for triangular, trilinear or ternary plots (yet other names are listed in the help) in which (for example) proportions or percents p q r are all between 0 and 1 (or 100%) and also add to 1 or 100%. So they define a plane in 3-space that can be projected onto a triangle in 2-space.
A recent thread https://www.statalist.org/forums/for...d-by-frequency started by Julia Mueller triggered various small revisions in the command.
Perhaps of most interest to anyone interested at all is that I unearthed a 2010 version that supports weights and hence marker symbols of different sizes. It seems that I fixed the code but never posted a public version.
I've also fixed a small bug in that with certain graph schemes spurious vertical grid lines would appear associated with horizontal (bottom) axis labels, added some references to the help, and made a few other even smaller changes to code or help.
In 2008 I gave a talk at the London meeting on alternatives to these plots that doesn't seem to have been overtaken by other implementations, so writing that up properly remains a goal for 2025 or 2026.
https://www.stata.com/statalist/arch.../msg00126.html
The package has triplot as main command with triplot6 as an extra museum item. It is for triangular, trilinear or ternary plots (yet other names are listed in the help) in which (for example) proportions or percents p q r are all between 0 and 1 (or 100%) and also add to 1 or 100%. So they define a plane in 3-space that can be projected onto a triangle in 2-space.
A recent thread https://www.statalist.org/forums/for...d-by-frequency started by Julia Mueller triggered various small revisions in the command.
Perhaps of most interest to anyone interested at all is that I unearthed a 2010 version that supports weights and hence marker symbols of different sizes. It seems that I fixed the code but never posted a public version.
I've also fixed a small bug in that with certain graph schemes spurious vertical grid lines would appear associated with horizontal (bottom) axis labels, added some references to the help, and made a few other even smaller changes to code or help.
In 2008 I gave a talk at the London meeting on alternatives to these plots that doesn't seem to have been overtaken by other implementations, so writing that up properly remains a goal for 2025 or 2026.
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