Slowly Converging Parafac Sequences: Swamps and Two-Factor Degeneracies
Feb 15 1993
The alternating least squares PARAFAC algorithm is a useful tool for resolving trilinear three-way data arrays. Occasionally, however, it becomes bogged down for many iterations in the vicinity of a poor quality resolution before moving on to a much superior optimum fit. We investigate this behavior in a simulation study and suggest ways of overcoming the obstacles it presents.
Keywords:trilinear models, Tensorial Resolution, PARAFAC, Swamps, Two-Factor Degeneracy