Triaxial Plot

Creates a 2D triaxial plot for 3-tuple data.

Creates a 2D triaxial plot for 3-tuple data. The plot axes are confined to an equilateral triangle, with each axis as a side to the triangle. The data tuples (rows) must sum to 1, otherwise they're ignored and not plotted. It tries to behave as any plot, i.e. axis labeling is permitted, multiple datasets with different colors and symbols work with hold on. Handles are returned for a legend.