Postings on science, wine, and the mind, among other things.
Build up a network by dragging from an existing node. This will add a node, or connect existing nodes (if you release the drag over another existing node). Clicking on a node or link will select or deselect it. Press delete or backspace to remove the selected node or link (note: if you separate the network into multiple components, centrality will no longer be updated). You can pan by dragging the background, and zoom using the scroll wheel. Toggle the type of centrality displayed using the button below the frame.
Networks are composed of two things: nodes and edges. In a social network, the nodes are typically people and the edges are the relationships (e.g. family, friendship, acquaintanceship) that connect people. Some nodes in the network are more "central" than others. However, there are a number of different ways of to be central to a network. The extent to which these different centrality measures are correlated depends on the shape of the network in question. The interactive demo above illustrates four types of centrality: degree, closeness, betweenness, and eigenvector. You can read more about each of them here or see below for a précis.
Additionally, three global statistics about the network you have created are shown in the top left hand corner of the chart:
© 2015 Mark Allen Thornton. All rights reserved.