Fig. 3

Visualization maps of keyword co-occurrence and cluster analysis networks. A Keyword co-occurrence analysis. Each node with colorful annual rings represents a keyword. The size of the nodes matches the publications outputs. The separate areas made up of nodes and links represent the relationship of different keyword. B Keyword cluster analysis. All keywords are divided into 15 clusters. The nodes and edges of different colors represent different clusters. C Visualization timeline view of keywords clustering analysis related to m6A methylation in viral infection. Horizontal lines of different colors with labels represent clusters formed by keywords, nodes on the horizontal line represent keywords, and the positions of nodes on the horizontal line represent the year when documents containing keywords first appeared, thus forming the timeline of the keyword clusters evolution