INTERACT: Estimation of interaction coefficients

Description

Computes automatically the interaction coefficients between two quantitative variables col.p and col.j for the following model: "~col.p+col.j+col.p:col.j". In most cases col.p represents the product effect, col.j represents the panelist effect, and the variables of interest are the sensory descriptors. The model considered is the following one: "~Product+Panelist+Product:Panelist". Data must be complete (but not necessarily balanced).

Results
Interactions		Contributions Panelists		Contributions Products

Outputs

Returns an array of dimension (p,j,k), where p is the number of products, j the number of panelists and k the number of sensory descriptors. The entries of this array are the interaction coefficients between a panelist and a product for a given descriptor.