Distribution of descriptor values for NSR and Arrhythmia subjects. The distribution of descriptors are shown using Box-whiskers (BW) plot (without outliers) of (a) log(SD 1), (b) log(SD 2) and (c) log(CCM) for Normal Sinus Rhythm (NSR, n = 54) and Arrhythmia (n = 272) subjects. From panel a, it is obvious that boxes (interquartile range) of normal and arrhythmia subjects are non-overlapping. But the whiskers (upper quartile) of normal subjects completely overlaps with the whiskers (lower quartile) of the arrhythmia subjects. From panel b, it is apparent that the BW of normal subjects completely overlapped with the whiskers (lower quartile) of the arrhythmia subjects. But the box of arrhythmia subjects is still non-overlapping with the whiskers (upper quartile) of the normal subjects. From panel c, it is obvious that both of them are non-overlapping and distinct.