Slowly Converging Parafac Sequences: Swamps and Two-Factor Degeneracies

Ben Mitchell, Donald Burdick
Duke University

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.


trilinear models, Tensorial Resolution, PARAFAC, Swamps, Two-Factor Degeneracy


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