CHAPT. 2 – When products are rated according to one single list of attributes

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“… the classical representation of the product space can be enhanced with confidence ellipses around the products. Such ellipses represent the variability around each product, in other words, the different positions that may take each product every time the composition of the panel is modified. These virtual panels are obtained by bootstrap, and using the “raw” data is indispensable. Similarly, the representation of the sensory attributes can be enhanced by plotting the variability of each attribute. Such graphical outputs can be obtained using the panellipse function of the SensoMineR package.”

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Exercises – database file(s) and corrections



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