Fig 1.
Research overview.
Table 1.
Cryptocurrency list.
Fig 2.
Process of time series symbolization.
Fig 3.
Histogram of correlation coefficient and mutual information in pre- and post-COVID-19 periods.
(a) Frequency distribution of two methods in 2019. (b) Frequency distribution of two methods in 2020.
Fig 4.
Comparison of correlation coefficient and mutual information over a given period.
Fig 5.
The mean, standard deviation, skewness, and kurtosis of distance matrix of correlation coefficient and mutual information methods at each time step.
Fig 6.
MST for each method in pre-COVID-19 period.
Colors represent types (see Table 1) and the edge’s thickness shows inversely proportional to the distance between two nodes.
Fig 7.
MST for each method in post-COVID-19 period.
Colors represent types (see Table 1) and the edge’s thickness shows inversely proportional to the distance between two nodes.
Fig 8.
Distribution of nodes’ degrees for the MSTs during pre- and post-COVID periods.
Table 2.
Network comparison for PMFGs and MSTs based on correlation coefficient and mutual information.
Fig 9.
Four types of centrality measures in pre- and post-COVID-19 period.