Fig. 5
From: Information Visualization to Enhance Sensitivity and Selectivity in Biosensing
a The patterns of nine coffees (Arabica—Brazil, Colombia, Guatemala and Kenya (A and B); Robusta—Angola, Ivory Coast, Uganda and Zaire) analyzed with an electronic sensor array appear almost superimposed in a Sammon’s mapping plot. b Good distinction was achieved when the data were plotted in a PCA diagram, with the first two principal components characterizing the Arabica and Robusta varieties. Reproduced with permission from Ref. [84]