Linkage criterion in hierarchical clustering in which the within-cluster variance is minimized.
Note: The initial cluster distances in Ward’s minimum variance method are the squared
Euclidean distance.
Source:
PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 433 (https://doi.org/10.1515/pac-2015-0605)