Streamgraph
mobile
Streamgraph is a type of stacked area chart. It displays a value (Y-axis) evolving with another value (X-axis). This evolution represents several groups, all of which have different colors. In contrast to the stacked area, there are no corners: the edges are rounded, giving a smooth impression. Moreover, the areas usually move around a central axis, forming flowing organic shapes. The following example shows the evolution of baby name frequencies in the United States between 1880 and 2015.