Sample Entropy calculation?
Thu, 10/18/2018 - 09:56 am
I am interested in calculating the sample entropy of a mostly sinusoidal signal:
Richman, J. S., and J. R. Moorman. “Physiological Time-Series Analysis Using Approximate Entropy and Sample Entropy.” American Journal of Physiology. Heart and Circulatory Physiology 278, no. 6 (June 2000): H2039-2049. https://doi.org/10.1152/ajpheart.2000.278.6.H2039
The signal consists of the angular velocity of a person's wrist during repetitive pronation-supination movements. There are intermittent "breaks" in the movement, in which the velocity has a handful (2-5) small peaks between the major, regularly occurring peaks. I'd like to measure these as irregularities in the signal. Sample entropy seems like an appropriate quantity for this purpose. Does Igor have functions to calculate sample entropy or some related measure of signal regularity/complexity?