# Network Visualization There are 2 categories: Node-link diagram and adjacency matrix. Tree can be containment channel. Node-link diagram: node as points and there exists link between them. Networks are commly represented as such, using connection. Nodes closed have tight grouping. (distance corresponding to link). Network topology: direct and indirect connections between nodes in terms of the number of hops between them through the set of links. Force-directed placement - many variants in the force-directed placement idiom family. Place nodes in random spatial regions and iteratively modify their location according to "push and pulling" forces. - non-deterministic. Matrix views: adjacency matrix view. Can also show weighted networks, each edge has weight. (Size, ordered channel etc.) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://tianyi0216.gitbook.io/blog/reading-notes/stats-other/network-visualization.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.