Ternplot is a Matlab package which plots ternary diagrams, use this tag for questions about it
Definition:
ternplot
is a MATLAB package that plots ternary phase diagrams using ternary phase data.
Example Usage:
TERNPLOT(A, B, C, LINETYPE)
Image Source: https://www.mathworks.com/matlabcentral/fileexchange/2299-alchemyst-ternplot