使用来自AJAX的JSON的D3.js 4直方图

<script src="https://d3js.org/d3.v4.min.js"></script>

<svg id="chart"></svg>

d3.json("data.json", function(data) {
  // 数据处理和可视化代码
});

var svg = d3.select("#chart");
var width = +svg.attr("width");
var height = +svg.attr("height");

var x = d3.scaleLinear()
  .domain([0, d3.max(data)])
  .range([0, width]);

var bins = d3.histogram()
  .domain(x.domain())
  .thresholds(x.ticks(10))
  (data);

var y = d3.scaleLinear()
  .domain([0, d3.max(bins, function(d) { return d.length; })])
  .range([height, 0]);

var bar = svg.selectAll(".bar")
  .data(bins)
  .enter().append("g")
  .attr("class", "bar")
  .attr("transform", function(d) { return "translate(" + x(d.x0) + "," + y(d.length) + ")"; });

bar.append("rect")
  .attr("x", 1)
  .attr("width", x(bins[0].x1) - x(bins[0].x0) - 1)
  .attr("height", function(d) { return height - y(d.length); });

bar.append("text")
  .attr("dy", ".75em")
  .attr("y", 6)
  .attr("x", (x(bins[0].x1) - x(bins[0].x0)) / 2)
  .attr("text-anchor", "middle")
  .text(function(d) { return d.length; });