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| 因子分析× | K-means クラスタリング× | |
|---|---|---|
| 分野≠ | 研究統計 | 機械学習 |
| 系統≠ | Process / pipeline | Machine learning |
| 提唱年≠ | 1931 | 1967 (formalized 1982) |
| 提唱者≠ | Louis Leon Thurstone | MacQueen, J. B.; Lloyd, S. P. |
| 種類≠ | Method | Partitional clustering |
| 原典≠ | Thurstone, L. L. (1947). Multiple Factor Analysis. University of Chicago Press. DOI ↗ | Lloyd, S. P. (1982). Least squares quantization in PCM. IEEE Transactions on Information Theory, 28(2), 129–137. DOI ↗ |
| 別名≠ | EFA, CFA, latent variable modeling | k-means clustering, Lloyd's algorithm, k-means partitioning, hard k-means |
| 関連≠ | 3 | 4 |
| 概要≠ | Factor analysis is a statistical technique for identifying latent (unobserved) dimensions underlying observed variables, developed by Louis Leon Thurstone in the 1930s and formalized by Jöreskog (1969). Exploratory factor analysis (EFA) discovers unknown factor structure from data; confirmatory factor analysis (CFA) tests hypothesized relationships between observed and latent variables. Essential in psychometrics (test development), organizational research (measuring constructs like leadership style), and biomedicine (identifying disease subtypes), factor analysis reduces dimensionality while revealing conceptual organization in multivariate data. | K-means is a classic unsupervised partitional clustering algorithm that divides a dataset into K non-overlapping groups by iteratively assigning each observation to its nearest centroid and updating centroids as the mean of their assigned points. It is one of the most widely used exploratory tools in machine learning and data analysis. |
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