| license: mit |
This is a simple d3.js tree diagram that loads an external data file as used as an example in the book D3 Tips and Tricks.
It is derived from the Mike Bostock Collapsible tree example but it is a VERY cut down version without the ability to update (collapse).
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Collapsible Tree Example</title> | |
| <style> | |
| .node circle { | |
| fill: #fff; | |
| stroke: steelblue; | |
| stroke-width: 3px; | |
| } | |
| .node text { font: 12px sans-serif; } | |
| .link { | |
| fill: none; | |
| stroke: #ccc; | |
| stroke-width: 2px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <!-- load the d3.js library --> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script> | |
| <script> | |
| // ************** Generate the tree diagram ***************** | |
| var margin = {top: 20, right: 120, bottom: 20, left: 120}, | |
| width = 960 - margin.right - margin.left, | |
| height = 500 - margin.top - margin.bottom; | |
| var i = 0; | |
| var tree = d3.layout.tree() | |
| .size([height, width]); | |
| var diagonal = d3.svg.diagonal() | |
| .projection(function(d) { return [d.y, d.x]; }); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.right + margin.left) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| // load the external data | |
| d3.json("treeData.json", function(error, treeData) { | |
| root = treeData[0]; | |
| update(root); | |
| }); | |
| function update(source) { | |
| // Compute the new tree layout. | |
| var nodes = tree.nodes(root).reverse(), | |
| links = tree.links(nodes); | |
| // Normalize for fixed-depth. | |
| nodes.forEach(function(d) { d.y = d.depth * 180; }); | |
| // Declare the nodes… | |
| var node = svg.selectAll("g.node") | |
| .data(nodes, function(d) { return d.id || (d.id = ++i); }); | |
| // Enter the nodes. | |
| var nodeEnter = node.enter().append("g") | |
| .attr("class", "node") | |
| .attr("transform", function(d) { | |
| return "translate(" + d.y + "," + d.x + ")"; }); | |
| nodeEnter.append("circle") | |
| .attr("r", 10) | |
| .style("fill", "#fff"); | |
| nodeEnter.append("text") | |
| .attr("x", function(d) { | |
| return d.children || d._children ? -13 : 13; }) | |
| .attr("dy", ".35em") | |
| .attr("text-anchor", function(d) { | |
| return d.children || d._children ? "end" : "start"; }) | |
| .text(function(d) { return d.name; }) | |
| .style("fill-opacity", 1); | |
| // Declare the links… | |
| var link = svg.selectAll("path.link") | |
| .data(links, function(d) { return d.target.id; }); | |
| // Enter the links. | |
| link.enter().insert("path", "g") | |
| .attr("class", "link") | |
| .attr("d", diagonal); | |
| } | |
| </script> | |
| </body> | |
| </html> |
| [ | |
| { | |
| "name": "Top Level", | |
| "parent": "null", | |
| "children": [ | |
| { | |
| "name": "Level 2: A", | |
| "parent": "Top Level", | |
| "children": [ | |
| { | |
| "name": "Son of A", | |
| "parent": "Level 2: A" | |
| }, | |
| { | |
| "name": "Daughter of A", | |
| "parent": "Level 2: A" | |
| } | |
| ] | |
| }, | |
| { | |
| "name": "Level 2: B", | |
| "parent": "Top Level" | |
| } | |
| ] | |
| } | |
| ] |
treeData undefined... am I missing something ?
Thank you very much!This helped me.
Hello
Its not working for my json file.
{
"Malaria":
{"children":["Plasmodium sp. LECOR04","Haemoproteus sp. Arg_H9"],
"type": "Disease"},
"Plasmodium sp. LECOR04":
{"children":["cytb"],
"type":"organism"},
"Haemoproteus sp. Arg_H9":
{"children":["cytb"],
"type":"organism"},
"cytb":{
"children":["Uganda","Uruguay"],
"type":"gene"},
"Uganda":{
"children":[],
"type":"location"},
"Uruguay":{
"children":[],
"type":"Location"},
"Anopheles funestus":{
"children":["ace-1"],
"type":"organism"},
"ace-1":{
"children":["Spain"],
"type":"gene"},
"Spain":{
"children":[],
"type":location"},
"Plasmodium falciparum":{
"children":["msp3"],
"type":"organism"},
"msp3":{
"children":["Italy"],
"type":"gene"},
"Italy":{
"children":[],
"type":"location"},
}
Please help me.
Thanks
Priya
treeData undefined... am I missing something ?
You need to delete the semicolon in the json file
treeData undefined... am I missing something ?
You need to delete the semicolon in the json file
Still getting treeData undefined
I would suggest that you make your JSON file as small as possible so that you can confirm that the problem is either in the JSON or the javascript. Then (assuming that the JSON is the problem) slowly add things somponents to the JSON file untill you strike the part of it that is causing the problem.
Thanks @d3noob for the suggestion it worked to get the data from json to webpage.
I would suggest that you make your JSON file as small as possible so that you can confirm that the problem is either in the JSON or the javascript. Then (assuming that the JSON is the problem) slowly add things somponents to the JSON file untill you strike the part of it that is causing the problem.
You can get rid of the "parent" property In JSON file it is not required and actually is redundant in a hierarchical structure such as JSON.
it will work for all type of json like '
var Josn = {
"name":"John",
"age":30,
"car":"Benz"
}
form this Json need to create a tree structure
i have tried it not working is there any way to create a tree structure from other type of json structure that you are used for example.
Awesome! This really, really helped me.