Dependency Structures in Differentially Coded Cardiovascular Time Series

Figure 1

Visualization of the copula process. (a) Estimated joint pulse interval density function with time lag 1 (it corresponds to PPlot); (b) estimated copula density showing the level of the dependency structure in plane; (c) the best fit theoretical copula (Clayton, = 4.2617, 20 bins). (d, e, f) 1D marginal densities; (d) PI time series; (e) and (f) transformed and calculated uniform density.

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