Multiscale Cross-Approximate Entropy Analysis as a Measure of Complexity among the Aged and Diabetic

Figure 3

Co_ApEn_{RRI′(𝜏)PTT′(𝜏)}(𝜏) curve of the four groups was calculated using the MCE calculation (𝜏=1∼20) on 1000 consecutive RRI and PTT times series. Symbols represent the mean values of entropy for each group, and bars represent the standard error (given by SE=SD/√𝑛, where 𝑛 is the number of subjects).