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- Approximate_entropy abstract "In statistics, an approximate entropy (ApEn) is a technique used to quantify the amount of regularity and the unpredictability of fluctuations over time-series data.For example, there are two series of data: series 1: (10,20,10,20,10,20,10,20,10,20,10,20...), which alternates 10 and 20. series 2: (10,10,20,10,20,20,20,10,10,20,10,20,20...), which has either a value of 10 or 20, chosen randomly, each with probability 1/2.Moment statistics, such as mean and variance, will not distinguish between these two series. Nor will rank order statistics distinguish between these series. Yet series 1 is "perfectly regular"; knowing one term has the value of 20 enables one to predict with certainty that the next term will have the value of 10. Series 2 is randomly valued; knowing one term has the value of 20 gives no insight into what value the next term will have.Regularity was originally measured by exact regularity statistics, which has mainly centered around various entropy measures.However, accurate entropy calculation requires vast amounts of data, and the results will be greatly influenced by system noise, therefore it is not practical to apply these methods to experimental data. ApEn was developed by Steve M. Pincus to handle these limitations by modifying an exact regularity statistic, Kolmogorov-Sinai entropy. ApEn was initially developed to analyze medical data, such as heart rate, and later spread its applications in finance, psychology, and human factors engineering.".
- Approximate_entropy wikiPageID "34073649".
- Approximate_entropy wikiPageRevisionID "594179527".
- Approximate_entropy hasPhotoCollection Approximate_entropy.
- Approximate_entropy subject Category:Entropy_and_information.
- Approximate_entropy subject Category:Time_series_analysis.
- Approximate_entropy comment "In statistics, an approximate entropy (ApEn) is a technique used to quantify the amount of regularity and the unpredictability of fluctuations over time-series data.For example, there are two series of data: series 1: (10,20,10,20,10,20,10,20,10,20,10,20...), which alternates 10 and 20.".
- Approximate_entropy label "Approximate entropy".
- Approximate_entropy sameAs m.0hr2hy1.
- Approximate_entropy sameAs Q4781760.
- Approximate_entropy sameAs Q4781760.
- Approximate_entropy wasDerivedFrom Approximate_entropy?oldid=594179527.
- Approximate_entropy isPrimaryTopicOf Approximate_entropy.