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The term "biplot" usually refers to the biplot of PC1 vs. PC2. However, there are other types of biplots, which might be useful in helping the analysis (follow this link). In particular, the 3-D biplot module is very useful for a better understanding the data.



In addition to the default biplot of PC1 vs. PC2, which may be referred to as the "primary biplot", GGEbiplot provides biplots of a higher order or secondary biplots:

For users who are familiar with AMMI (Additive Main effect and Multiplicative Interaction) analysis, GGEbiplot also generates the two most commonly used AMMI biplots:

In addition, GGEbiplot also provide a 3D-biplot viewer: