Multivariate data having two or more kinds of explanatory variable per object.
Notes: - For two groups of explanatory variables the data is termed ‘three-way’.
- Models that decompose multi-way data include PARAFAC, Tucker3 model.
Example: Fluorescence intensities with excitation wavelength and emission wavelength representing the two variable axes, and the objects making the third direction.
Source:
PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 411 (https://doi.org/10.1515/pac-2015-0605)