Journal
FOOD QUALITY AND PREFERENCE
Volume 30, Issue 2, Pages 77-85Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodqual.2013.04.013
Keywords
Exploratory multivariate analysis; Missing values; Multi-table data; Multiple factor analysis; Napping data
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Handling missing values is an unavoidable problem in the practice of statistics. We focus on multiple factor analysis in the sense of Escofier and Pages (2008), a principal component method that simultaneously takes into account several multivariate datasets composed of continuous and/or categorical variables. The suggested strategy to deal with missing values, named regularised iterative MFA, is derived from a method available in principal component analysis which consists in alternating a step of estimation of the axes and components and a step of estimation of the missing values. The pattern of missing values considered can be structured with missing rows in some datasets. Some simulations and real examples that cover several situations in sensory analysis are used to illustrate the methodology. We focus on the important issue of the maximum number of products that can be assessed during an evaluation task. (C) 2013 Elsevier Ltd. All rights reserved.
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