The Shannon entropy of a time series is a standard measure to assess the complexity of a dynamical process and can be used to quantify transitions between different dynamical regimes. An alternative way of quantifying complexity is based on state recurrences, such as those available in recurrence quantification analysis. Although varying definitions for recurrence-based entropies have been sugg...

Most data that are collected are multivariate in nature, and much of them can be regarded as continuous. In the initial stages of analysis, graphic displays can be used to explore the data, but for multivariate data, traditional histograms or twoor three-dimensional scatter plots may miss complex relationships that exist in the data set. A number of methods for graphically displaying multivaria...

Concerns about the efficiency and the reliability of point sampling to estimate change in forest growth variables have been expressed ever since point sampling appeared in the literature more than 60 years ago. Change estimators for point samples based on point-to-tree distance in variable-radius plots were introduced about 30 years ago but are rarely implemented despite easy access to point-to...

Data on vehicle operating conditions have been recorded by a specially equipped car. while circulating through Naples on several typical routes. during rush hours. Traffic was defined in terms of parts of movements between two consecutive stops ("kinematic sequences"). characterized by a number of kinematic variables. such as mean velocity. driving and idling time. gear ratio. number of peaks. ...