Edge Arrays

The data type edge_array<E> can be used to associate additional (LEDA or user defined) information of type E with the edges of a graph.

Example of how to use a edge array for a graph

Strengths

• more efficient access than with Edge Maps
• there can be an arbitrary number of Edge Arrays for a graph
• Edge Arrays can be defined at any point in a program

Disadvantages

• less efficient than Parameterized Graphs
• only works well for static graphs: A new edge will not have a corresponding entry in the Edge Array (explicit init() is necessary)
• cost of declaring an Edge Array is proportional to the number of edges in the graph

Tips

• Edge Arrays are primarily useful for static graphs. They are the most convenient and most widely used way to associate information with edges of static graphs and for dense arrays, that is, most of edges need an entry.
• Using Edge Arrays for highly dynamic graphs is quite inconvenient.

See also:

Parameterized Graphs

Edge Maps

Associate Information with Graphs

Graphs and Related Data Types

Arrays

Manual Entries:

Manual Page Edge Arrays

User Defined Parameter Types