Let pi,j be the rate at which word i occurs in document j, and pj be the average across documents( sum Pij/ndocs)The size of each word is mapped to its maximum deviation ( maxi(pi,j- pj ) ), and its angular position is determined by the document where that maximum occurs.
Tools & techniquesfor working withdatasets Tony Hirst Dept of Communication and Systems The Open University
Overview first, zoom and filter, then details-on-demandFrom: The Eyes Have It:A Task by Data Type Taxonomy for Information Visualizations
• X and Y (at a push, Z)• Node size and colour• (Node label size and colour)• Edge thickness and colour• (Edge label and colour)• Node proximity/grouping• Clustering• Filtering and differential application of the above
Group by Hierarchy inside(implied) containment