Porovnat metody
Prohlédněte si vybrané metody vedle sebe; řádky, které se liší, jsou zvýrazněny.
| Regularizovaný Gaussovský Směsný Model× | K-means Shlukování× | |
|---|---|---|
| Obor | Strojové učení | Strojové učení |
| Rodina | Machine learning | Machine learning |
| Rok vzniku≠ | 2000s–2010s | 1967 (formalized 1982) |
| Tvůrce≠ | Fraley, C. & Raftery, A. E. (regularization formalized); sklearn team (practical reg_covar parameter) | MacQueen, J. B.; Lloyd, S. P. |
| Typ≠ | Probabilistic clustering with regularization | Partitional clustering |
| Původní zdroj≠ | Fraley, C. & Raftery, A. E. (2002). Model-based clustering, discriminant analysis, and density estimation. Journal of the American Statistical Association, 97(458), 611–631. DOI ↗ | Lloyd, S. P. (1982). Least squares quantization in PCM. IEEE Transactions on Information Theory, 28(2), 129–137. DOI ↗ |
| Další názvy | Regularized GMM, GMM with covariance regularization, stabilized Gaussian mixture model, penalized GMM | k-means clustering, Lloyd's algorithm, k-means partitioning, hard k-means |
| Příbuzné≠ | 5 | 4 |
| Shrnutí≠ | A Regularized Gaussian Mixture Model (GMM) adds a small positive constant to the diagonal of each component covariance matrix during the Expectation-Maximization algorithm, preventing singular or near-singular matrices that cause numerical failures when the data are sparse, high-dimensional, or contain near-duplicate observations. | 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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