Gower, John C. and Dijksterhuis, Garmt B.
(1994).
Coffee images: a study in the simultaneous display of multivariate quantitative and categroical variables for several assessors.
Quality and Quantity, 28(2),
pp. 165–184.
Abstract
The paper discusses a small image study in which seven assessors judge nine brands of coffee in terms of six quantitative variables and five categorical variables. Generalised Procrustes Analysis and Generalised Biplots are combined to display simultaneously information on the brands and on both quantitative and categorical variables. An outline is given of the methodology.
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