Topic Tree view

[phongvis]

The goal is to compare multiple topics from multiple models.

• [ ] Migrate existing topic tree
• [ ] Response to brushing from other views
• [ ] Which criteria to sort models from top to bottom?
• [ ] Term probabilities are small, not able to see clearly

[phongvis]

Currently, a child C is connected to its parent P because among the topics in the above layer, P is the most similar to C. What can be issues here?

• Perception: when seeing a tree structure, what do people think? A split topic? It's not what the layout guarantees.
• No notion of similarity (from Task-Driven Comparison of Topic Models by Alexander and Gleicher)
  • How strong is the similarity? Are C and P very similar or it's simply because the rest are so different from C?
  • Is P a clear winner?
  • Is it reciprocal? I.e., among the topics in the below layer, C is the most similar to P.