Find out how to use maps, charts and graphs in writing with this BBC Bitesize Scotland article for P2, P3, P4, P5, P6, P7 - First and Second Level CfE ...

In this example, the data, the bar chart, and the reports are simple so that you can focus on the code needed to generate a drill-down graph. For more realistic drill-down examples, see Creating Bar ...

Using this definition of path, OP, you must realize that there may be exponentially (in the number of vertices + edges in the graph) many paths between two vertices (even in simple graphs).

For example, the book’s version of the global wealth pyramid has to deploy an inset to subdivide the 1.9mn people at the top. There are too few of them to do this neatly on the main chart.

Another example is Pinterest, touting how its Interest Graph infrastructure infuses value to millions upon millions of pinned digital photos, establishing a digital gold mine for marketers and ...