There are many types of "Network" in the world.
Society, machines, the nature, studies and so on.
Nodes are people or areas. Edges are distance.
Nodes are machiens. Edges are lines.
In the fields of Percolation, nodes are lattices. Edges are next doors or not.
Nodes are phenomena. Edges are relationship.
In the fields of Multi-Variable Analysis and Data Mining, nodes are variables. Edges are strength of correlation.
Associations Analysis is one of the kinds of Data Mining. In this method, nodes are categories. Edges are subordination.
Text Mining is one of the kinds of Data Mining. In this method, nodes are words. Edges are relationship of words.
