Research Article
On Consistency of Cross-Approximate Entropy in Cardiovascular and Artificial Environments
Table 6
Steps for reliable XApEn estimation.
| Step | Explanation |
| | Choose two time series and specify which one would be master series; define and (preferably ); perform standard scoring of both series. | | Find the differential time series both for master and for follower time series, and calculate their respective standard deviations and . | | Calculate (see (18)). | | Calculate (see (17)). | | Select reliability criterion; a strong criterion requires long data sets, so a weak criterion is suggested. | | Calculate (see (19)), weak criterion (preferably); or calculate (see (20)), strong criterion. | | Estimate XApEn(N, m, ). |
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