evolving factor analysis

initialism: EFA
https://doi.org/10.1351/goldbook.10092

Factor analysis that follows the change or evolution of the rank of the data matrix as a function of an ordered variable.

Notes:
  1. The ordering variable may be time.
  2. The changing rank is calculated by principal-component analysis on an increasing data matrix.
Source:
PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 419 (https://doi.org/10.1515/pac-2015-0605)