Plot of the factor loadings of food groups (active variables) and food items (supplementary variables). Active and supplementary variables are plotted on the first two components of the PCA. All active variables (food groups) appear in green and capital letters. Supplementary variables (food items) appear in orange and small letters. For clarity, only well represented food items, i.e. items whose sum of cos2 on the first two components was superior to the mean, are named in the graph. Other food items were not informative for interpretation and were not labelled.
Becquey et al. Nutrition Journal 2010 9:13 doi:10.1186/1475-2891-9-13