If you are conducting network analysis on data you have identified yourself, your data needs to be formatted in a particular way in order to work with visualization software. Usually, for the most basic networks, you will need to create a list in a spreadsheet of all entities you want to include, called a “node list.” You will also need an “edge list” containing the interactions between nodes with a node name in the first column, and the node name of the other entity in the second column with whom an interaction takes place.