Fig. 1From: Analyzing hidden populations online: topic, emotion, and social network of HIV-related users in the largest Chinese online communityBasic statistics of online posting. a Distribution of the number of posts and comments. The horizontal axis represents the number of users’ posts or comments, and the vertical axis represents the frequency. b Comparison of posting time among different populations. The horizontal axis represents hours in the day, and the vertical axis represents the average proportion of posts generated in each hourBack to article page