Σύγκριση μεθόδων

	Εντροπία Μεταφοράς	Δοκιμή Αιτιότητας Granger	Εντροπία Δείγματος
Πεδίο	Αιτιακή Συμπερασματολογία	Οικονομετρία	Πολύπλοκα Συστήματα
Οικογένεια	Machine learning	Regression model	Machine learning
Έτος προέλευσης	2000	1969	2000
Δημιουργός	Thomas Schreiber	Clive W. J. Granger	Richman & Moorman
Τύπος	Non-parametric information-theoretic measure	Time-series predictive causality test	Nonlinear entropy measure
Θεμελιώδης πηγή	Schreiber, T. (2000). Measuring information transfer. Physical Review Letters, 85(2), 461–464.	Granger, C. W. J. (1969). Investigating Causal Relations by Econometric Models and Cross-spectral Methods. Econometrica, 37(3), 424-438.	Richman, J. S., & Moorman, J. R. (2000). Physiological time-series analysis using approximate entropy and sample entropy. American Journal of Physiology, 278(6), H2039–H2049.
Εναλλακτικές ονομασίες	Schreiber Information Transfer, Directed Information Flow, Conditional Mutual Information (directed), Transfer Entropisi	Granger causality test, Granger non-causality test, predictive causality test, Granger Nedensellik Testi	SampEn, Sample Entropy (SampEn), Örneklem Entropisi, Nonlinear Complexity Measure
Συναφείς	3	5	2
Σύνοψη	Transfer Entropy (TE) is a non-parametric, information-theoretic measure of directed statistical dependence between two time series, introduced by Thomas Schreiber in 2000. Grounded in Shannon entropy, it quantifies how much information the past of one process Y reduces uncertainty about the next state of another process X, beyond what X's own past already provides. Unlike linear correlation or Granger causality, TE captures nonlinear interactions and requires no model assumptions about the underlying dynamics.	The Granger causality test, introduced by Clive W. J. Granger in 1969, assesses whether the past values of one time series help predict another beyond what the latter's own past already explains. It defines causality in a strictly predictive sense rather than as a structural or physical cause.	Sample Entropy (SampEn) is a nonlinear measure of the complexity and regularity of a time series. Introduced by Richman and Moorman in 2000 as an improvement over Approximate Entropy (ApEn), it quantifies the likelihood that similar patterns of a given length in the series remain similar when extended by one additional data point. A higher SampEn value indicates greater irregularity and complexity, while a lower value indicates more regularity or self-similarity.