 use the well-known _amino acids data set_ from Andersson and Bro.
% It contains fluorescence measurements of 5 samples containing 3 amino
% acids: Tryptophan, Tyrosine, and Phenylalanine.Each amino acid
% corresponds to a rank-one component. The tensor is of size 5 x 51 x 201
% from  5 samples, 51 excitations, and 201 emissions. 
% Further details can be found here: 
% <http://www.models.life.ku.dk/Amino_Acid_fluo>.
% Please cite the following paper for this data: 
% Rasmus Bro, PARAFAC: Tutorial and appli