From: Review and classification of variability analysis techniques with clinical applications
Domain Assumptions | Features | Feature Assumptions | Transformation used | References |
---|---|---|---|---|
The information is held in the specific position of the points represented in a reference space (deterministic system) | Grid counting | Low dimensionality of the attractor | Grid transformation | |
 | Heart rate turbulence | Information is in the ectopic beats |  | [65] |
 | Poincaré plots features | Low dimensionality of the attractor | Poincaré plots | |
 | Recurrence plot features | The attractor can be effectively described by the distances between its points | Recurrence plots | |
 | Spatial filling index | The attractor is described by its degree of sparseness | Phase space representation |