**2** Publications

- Page
**1**of**1**

Entropy (Basel) 2020 Jun 21;22(6). Epub 2020 Jun 21.

Institute of Physics, University of Zielona Gora, 65-417 Zielona Gora, Poland.

Relative consistency is a notion related to entropic parameters, most notably to Approximate Entropy and Sample Entropy. It is a central characteristic assumed for e.g., biomedical and economic time series, since it allows the comparison between different time series at a single value of the threshold parameter . There is no formal proof for this property, yet it is generally accepted that it is true. Relative consistency in both Approximate Entropy and Sample entropy was first tested with the M I X process. In the seminal paper by Richman and Moorman, it was shown that Approximate Entropy lacked the property for cases in which Sample Entropy did not. In the present paper, we show that relative consistency is not preserved for M I X processes if enough noise is added, yet it is preserved for another process for which we define a sum of a sinusoidal and a stochastic element, no matter how much noise is present. The analysis presented in this paper is only possible because of the existence of the very fast NCM algorithm for calculating correlation sums and thus also Sample Entropy.

## Download full-text PDF |
Source |
---|---|

http://dx.doi.org/10.3390/e22060694 | DOI Listing |

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517231 | PMC |

June 2020

Clin Neurol Neurosurg 2020 05 10;192:105732. Epub 2020 Feb 10.

Department of Physiology and Pharmacology, Clinical Research and Imaging Centre, University of Bristol, UK. Electronic address:

## Download full-text PDF |
Source |
---|---|

http://dx.doi.org/10.1016/j.clineuro.2020.105732 | DOI Listing |

May 2020

-->