Figure 2.

Boxplots showing the distribution of $\mathsf{\Delta }\left[K^{+}\right]$ (blue) and the described $\pi C^{\mathrm{T}}$-based time warping biomarkers $d_w$ (purple) and ${\widehat{d}}_{w,c}$ (green), computed at each time points ($h_0$ to $h_5$), see Figure 1. The central line of the boxplots represents the median, the edges of the box are the 25-th and 75-th percentiles, and the whiskers extend to the most extreme data points not considered as outliers. The notches represent the 95% confidence interval of the median, calculated as $q_2-1.57(q_3-q_1)/\sqrt{n}$ and $q_2$ + $1.57(q_3-q_1)/\sqrt{n}$ being $q_2$ the median, $q_1$ and $q_3$ are the 25-th and 75-th percentiles, respectively, and n is the sample size. Finally, red “+” denotes outliers. Data adapted from [20,21].