On the equivalence of window factor analysis and orthogonal projection resolution
Window factor analysis (WFA) and orthogonal projection resolution (OPR) are two factor analytical techniques for extracting component concentration profiles from two-way evolutionary data. Both methods take advantage of the fact that each component lies in a special region along the evolutionary axis. Theoretical equations are derived to prove that WFA is equivalent to OPR, if errors are ignored. (C) 1999 Elsevier Science B.V. Ail rights reserved.
equivalence window factor analysis orthogonal projection resolution