The last two layouts and corresponding visualizations that we will examine help the viewer to understand how data changes as it flows over time or through intermediate points.
A streamgraph demonstrates the change in values in a multiple series of data as a flowing stream of data. The height of each stream represents the value of that stream at that moment in time.
They are useful for demonstrating where certain categories start or stop at different points along the graph. Common examples are data such as box-office receipts or the number of listeners for various artists on streaming media as they change over time.
To demonstrate a streamgraph, we will use ...