// create an array with nodes
var nodes = new vis.DataSet([
{id: 1, label: 'Person 1'},
{id: 2, label: 'Person 2'},
{id: 3, label: 'Person 3'},
{id: 4, label: 'Person 4'},
{id: 5, label: 'Person 5'},
{id: 6, label: 'Person 6'},
{id: 7, label: 'Person 7'},
{id: 8, label: 'Person 8'},
{id: 9, label: 'Person 9'},
{id: 10, label: 'Person 10'},
{id: 11, label: 'Person 11'},
{id: 12, label: 'Person 12'},
{id: 13, label: 'Person 13'},
{id: 14, label: 'Person 14'},
{id: 15, label: 'Person 15'},
{id: 16, label: 'Person 16'},
{id: 17, label: 'Person 17'},
{id: 18, label: 'Person 18'},
{id: 19, label: 'Person 19'},
{id: 20, label: 'Person 20'},
{id: 21, label: 'Person 21'},
{id: 22, label: 'Person 22'},
{id: 23, label: 'Person 23'},
{id: 24, label: 'Person 24'},
{id: 25, label: 'Person 25'},
{id: 26, label: 'Person 26'},
{id: 27, label: 'Person 27'},
{id: 28, label: 'Person 28'},
{id: 29, label: 'Person 29'},
{id: 30, label: 'Person 30'},
{id: 31, label: 'Person 31'},
]);
// create an array with edges
var edges = new vis.DataSet([
{from: 1, to: 5, arrows:'from'},
{from: 2, to: 23, arrows:'from'},
{from: 3, to: 2, arrows:'from'},
{from: 4, to: 2, arrows:'from'},
{from: 5, to: 7, arrows:'from'},
{from: 6, to: 9, arrows:'from'},
{from: 7, to: 13, arrows:'from'},
{from: 8, to: 11, arrows:'from'},
{from: 13, to: 16, arrows:'from'},
{from: 16, to: 14, arrows:'from'},
{from: 18, to: 25, arrows:'from'},
{from: 19, to: 26, arrows:'from'},
{from: 20, to: 30, arrows:'from'},
{from: 21, to: 28, arrows:'from'},
{from: 22, to: 20, arrows:'from'},
{from: 23, to: 18, arrows:'from'},
{from: 1, to: 6, arrows:'from'},
{from: 2, to: 22, arrows:'from'},
{from: 3, to: 1, arrows:'from'},
{from: 4, to: 1, arrows:'from'},
{from: 5, to: 8, arrows:'from'},
{from: 6, to: 10, arrows:'from'},
{from: 8, to: 12, arrows:'from'},
{from: 13, to: 17, arrows:'from'},
{from: 16, to: 15, arrows:'from'},
{from: 18, to: 24, arrows:'from'},
{from: 19, to: 27, arrows:'from'},
{from: 20, to: 31, arrows:'from'},
{from: 21, to: 29, arrows:'from'},
{from: 22, to: 21, arrows:'from'},
{from: 23, to: 19, arrows:'from'},
]);
// create a network
var container = document.getElementById('mynetwork');
// provide the data in the vis format
var data = {
nodes: nodes,
edges: edges
};
var options = {
layout: {
hierarchical: {
enabled: true,
//levelSeparation: 130,
nodeSpacing: 220,
blockShifting: false,
parentCentralization: false,
edgeMinimization: true,
direction: 'DU',
sortMethod: 'directed',
},
},
edges: {
smooth: {
type: "cubicBezier",
forceDirection: 'vertical',
roundness: 0.25
},
},
physics: false,
}
// initialize your network!
var network = new vis.Network(container, data, options);
<script src="https://cdnjs.cloudflare.com/ajax/libs/vis/4.21.0/vis.min.js"></script>
<body>
<div id="mynetwork"></div>
</body>
See Question&Answers more detail:
os 
