Figure 9

Variable importance for the within one week and month prediction experiments performed on main dishes. Color coding is used to group the features into the 7 feature classes investigated. While it is the features based on ‘recipe innovation’ and ‘presentation’, which are the most important ones in Allrecipes.com, it is the ‘user activity & context’ set, which is the most important one in Kochbar.de. The plots also show that these patterns are rather stable regardless of if we try to predict ratings or comments and whether popularity is measured within a week or within a month time. Comparable patterns are also observed if we predict popularity after a year