Fig. 2From: Revealing topics and their evolution in biomedical literature using Bio-DTM: a case study of ginsengVisualization of ginseng-related topics discovered by Bio-DTM. The river stands for the 20 topics and their evolution over 16 time slices. The river, horizontally flowing from left to right, represents the whole collection time shaft from 1975 to 2017 and different colored currents represent the 20 topics, respectively. The width variation of every river visually depicts changes in strength or popularity of the corresponding topic over time sliceBack to article page