| Nonlinear Dynamics, Psychology, and Life Sciences, Vol. 5, Iss. 1, Jan, 2001, pp. 77-87 @2001 Society for Chaos Theory in Psychology & Life Sciences Generating Replications of Chaotic Time Series Abstract: This paper addresses the problem of resampling chaotic time series. We propose a method based on resampling distances between nearest neighbours in phase space, so that the resampled time series present the original points differently positioned along the trajectory. This approach allows one to obtain time series with the same length of the original one, so that confidence intervals for Lyapunov exponents, correlation dimension and other invariants would be determined. For its generality this kind of resampling would be applicable to chaotic time series no matter the observations concern natural or life sciences. The method has been tested with common simulated chaotic systems with both clean and noisy data. Short and noisy time series, as the ones we simulated, typically occur in medicine, biology, and social sciences. Keywords: chaotic time series, bootstrap, resampling methods, invariants estimation |