Ternary Scatter and Ternary Contour Charts

A 2-D projection of a ternary plot displaying the relative proportions (as percentages) of three variables on three axes. In this graph type, you can display the data points by group using object markers (see the left-hand side image below), or display the data as value-labels representing values of a 4^th variable (see the right-hand side image below).

For calculating ternary error regions, three possible values are considered for each variable:

• The raw value
• The raw value plus the positive error bar value
• The raw value plus the negative error bar value

Accordingly, Aabel calculates 27 possible combinations for each ternary data point and uses the convex hull to delineate the resulting hexagonal error region:

Precise zooming into a sub-triangle region of data within a ternary chart can not be achieved using the standard zoom tool. In Aabel, controls are provided in the ternary axis dialog to perform ternary zooming.

This is a 2-D projection of a ternary diagram that displays values of a 4^th dimension using a color scale, contouring by triangulation.