Type PARAFAC to get help on the I/O format of the PARAFAC algorithm.
To calculate a one-component PARAFAC model type
Factors = PARAFAC(X,1);
Where X is the data and 1 is the number of factors to extract.
Remember that in PARAFAC the models are not nested, so if a two-component model
is to be estimated one can not use the one-component model as a basis as in ordinary
two-way PCA.