March 2015
Intermediate to advanced
282 pages
6h 10m
English
Content preview from JMP 12 Essential GraphingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 12
Ternary Plots
View Plots for Compositional or Mixture Data
The Ternary Plot command in the Graph menu produces a three-axis plot.
Ternary plots are a way of displaying the distribution and variability of three-part compositional data. (For example, the proportion of sand, silt, and clay in soil or the proportion of three chemical agents in a trial drug.) You can use data expressed in proportions or use absolute measures.
The ternary display is a triangle with sides scaled from 0 to 1. Each side represents one of the three components. A point is plotted so that a line drawn perpendicular from the point to each leg of the triangle intersect at the component values of the point.
Figure 12.1 Examples of Ternary Plots
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