Appendix S: Biplots, Correspondence Analysis, and Principal Components Analysis

Abstract

Multivariate graphical displays, also known as biplots, describe relationships among “Just About Right” attributes across samples. Biplots are a visual means to show multidimensional data relationships. There are many techniques that can be used to generate the necessary data for biplots, such as principal components analysis, multidimensional scaling, correspondence analysis, and discriminant analysis. Two of these methods, correspondence analysis (CA) and principal components analysis (PCA), were considered in this case study