var treeLayout = d3.layout.tree() .size([width, height]); var rootNode = { name: "Root", children: [...] }; var nodes = treeLayout.nodes(rootNode); var links = treeLayout.links(nodes);
var clusterLayout = d3.layout.cluster() .size([width, height]); var rootNode = { name: "Root", children: [...] }; var nodes = clusterLayout.nodes(rootNode); var links = clusterLayout.links(nodes);This code creates a cluster tree layout, where nodes are organized in a radial cluster. The `size` method sets the width and height of the tree. The `nodes` method creates an array of nodes, while the `links` method creates an array of links between nodes. Overall, these examples use the d3.js library to create hierarchical tree layouts, which can be used to visualize data in a hierarchical structure.