d3使用json文件的带有工具提示的响应式分组条形图

Question

I want to use this Grouped Bar Chart however I want get data from JSON and not a CSV file. can any one solve my question.

Answer 1

Start with

d3.json("file.json", function (error, data) {
        console.log(d3.values(data)); // check data in console
        // loop through JSON data
        data.forEach(function (d) {          
            d.value = +d.value;
        });

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