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    <p>First, lets look at what <code>d3.json</code> does.</p> <pre><code>d3.json("/assets/flare.json", function(root) { // code that uses the object 'root' }); </code></pre> <p>This loads the file <code>/assets/flare.json</code> from the server, interprets the contents as JSON and passes the resulting object as the <code>root</code> argument to the anonymous function.</p> <p>Where you already have a JSON object, you don't need to use the <code>d3.json</code> function - you can just use the object directly.</p> <pre><code>var root = { "name": "flare", "children": [ ... ] }; // code that uses the object 'root' </code></pre> <p>If the object is represented as a string, then you can use <code>JSON.parse</code> to get the object:</p> <pre><code>var myString = '{"name": "flare","children": [ ... ] }'; var root = JSON.parse(mystring); // code that uses the object 'root' </code></pre> <p>Second, lets look at what <code>d3.layout.cluster</code> expects of your data. As per <a href="https://github.com/mbostock/d3/wiki/Cluster-Layout">the docs</a>: </p> <blockquote> <p>... the default children accessor assumes each input data is an object with a children array ...</p> </blockquote> <p>In other words, you data needs to be of the form:</p> <pre><code>var mystring = '{ "name": "Product", "children": [ { "name": "id", "type": "number", "description": "Product identifier", "required": true }, ... { "name": "stock", "type": "object", "children": [ { "name: "warehouse", "type": "number" }, { "name": "retail", "type": "number" } ] } ] } </code></pre>
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    1. PORender D3 graph from a string of JSON instead of a JSON file
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    1. USknolleary
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    1. PORender D3 graph from a string of JSON instead of a JSON file
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    1. COknolleary, thank you for the explanation. This is helpful, but what I am specifically looking for is: How do I change the d3.json("/assets/flare.json", function(root) { line to allow for a local string? d3.json's syntax is: d3.json(url[, callback]). I want to run the anonymous function on my string, rather than a URL.
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      1. USQuincy Larson
    2. COMichael, you change the d3.json(..) line by getting rid of it... if you already have the string, you don't need use a function to load content from a url, which is all that d3.json does. The anonymous function currently specified in the d3.json(..) call can simply be explicitly called with the string you have. This is what I was trying to describe in the first half of my answer.
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    3. COhow can i load a json file instead ? it always gives error to me
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