Table 1.
Approach | Method | Data sets | Refs. | Comments |
---|---|---|---|---|
Classification into regimes by position | ||||
Cluster analysis | Categorical | NH | 25 | Fuzzy |
NH + sectorial | 33 | Hard (K − means) | ||
Hierarchical | NH + sectorial | 26 | 3 NH clusters | |
PDF estimation | Univariate | NH | 48 and 49 | Bimodality |
Multivariate | NH | 27 and 31 | 3 modes | |
NH + sectorial | 28 | Multimodal | ||
29 | 3 NH clusters | |||
Classification into regimes by persistence | ||||
Pattern correlations | NH | 81 | ||
SH | 82 | 3 regimes | ||
Minima of tendencies | Models Atl.–Eur. sector | 6, 34, and 83 35 | 4 regimes | |
Transition probabilities | ||||
Counts | Model & NH | 25 | Elementary | |
Monte Carlo | NH & SH | 54 | Advanced | |
NH + sectorial | 28 | Advanced |