loadings

https://doi.org/10.1351/goldbook.10096
Projection of a factor onto the variables.
Notes:
  1. "Loadings" (plural) refers to a column in the loadings matrix that relates to a particular factor. "loading" (singular) is the particular contribution of a variable in the original space to the factor.
  2. The loadings on a factor reflect the relationships between the variables on that factor.
  3. In principal component analysis the loadings are also the cosine angles between the variables and a particular factor.
  4. In multivariate curve resolution the term "pure component spectrum" is interchangeable with the term "loading" and is therefore deprecated. The term, in spectroscopy, may be confused with the spectrum for a pure material.
See: score
Source:
PAC, 2016, 88, 407. (Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)) on page 420 [Terms] [Paper]
Citation: 'loadings' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.10096 RIS BibTex EndNote
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