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Table 7 Summary of the informational domain

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 degree of complexity, therefore: distance from periodicity and stochasticity, distance from a reference model, distance from a precedent pattern within the data

Approximate entropy

  

[4, 71, 77–79]

 

Conditional entropy

 

Bins

[25]

 

Compression entropy

  

[17, 81]

 

Fuzzy entropy

  

[77, 80]

 

Kullback-Leibler permutation entropy

 

Symbolic dynamics and phase space representation

[82]

 

Multiscale entropy

The complexity changes depending on the window length used in the analysis

 

[76, 83]

 

Predictive-based features

The data follows a model, and the deviation (prediction error) from that model describes changes in the system.

Multiple

[56, 84, 85]

 

Sample entropy

  

[4, 71, 77–79]

 

Shannon entropy

 

Bins

[25, 52, 53, 56, 86]

 

Similarity indexes

The comparison of the properties of two successive windows allows the detection of changes in a time series

Multiple

[26, 45, 87, 88]

 

Rényi entropy

Bins

[25]

Â