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Discrimination and representativeness of testers

From Biplot Analysis, click Rank Entries/Testers…

Select With ref. To an "Ideal" Tester. The following will appear on the biplot:

• a red circle indicating the average tester;
• a red line that passes through the biplot origin and the average tester (average tester axis);
• A red arrow pointing to the "Ideal" tester, which is defined as an tester for testing the entries; and
• a set of 5 concentric circles with the "ideal" tester being the concentric center.
• The entries are represented by "c" to indicate that they are treated as "random" samples of the entries and this view is to focus on the testers.

Note: If the biplot was not in the tester-focused singular value partitioning, this partitioning method will be automatically applied.

Interpretation:

• The closer a tester is located to this 'ideal" tester, the more desirable it is judged on both Discrimination and representativeness. The ranking of the testers is:

Tester3 > Tester1 = Tester2 > Tester4 = Tester9 > Tester6 > Tester5 > Tester8 = Tester9.

In Depth:

This function applies only to GGE biplots with certain data scaling methods.  Particularly, GGE biplot based on Standard Deviation scaled data does NOT have this interpretation.