Four-way data input and visualization

Year-location-genotype-trait four way data is the common structure of multi-year regional variety trials. GGEbiplot reads the data from a single file and generates and displays in a biplot all possible two-way tables:

• genotype by year biplot for any of the traits...

• genotype by location biplot for any of the traits...

• genotype by environment (year-location combination) for any of the traits...

• genotype by trait across all environments

• genotype by trait across some environments

• genotype by trait biplot in any one of the environments

• genotype by year-location-trait biplot

• year by trait biplot

• location by trait biplot

• year-location by trait biplot

• year-location-genotype by trait biplot

• year by location biplot for any of the traits

The following is a snapshot of the menu under 4-way data analysis in GGEbiplot:

Hint: GGEbiplot analyzes ALL types of four-way data, Year-location-genotype-trait four way data can be generalized as Factor1 by Factor2 by Factor3 by Factor4 four-way data.

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