Question

我从here抓取了这段代码，只修改了数据变量：

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.bar rect {
  fill: steelblue;
}

.bar text {
  fill: #fff;
  font: 10px sans-serif;
}

</style>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var data = [1,1,1,1, 2,2,2,2,2, 4,4, 5, 6,6,6, 7,7,7, 9,9,9, 12,12,12,12,12,12,12];

var formatCount = d3.format(",.0f");

var svg = d3.select("svg"),
    margin = {top: 10, right: 30, bottom: 30, left: 30},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom,
    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var x = d3.scaleLinear()
    .rangeRound([0, width]);

var bins = d3.histogram()
    //.domain([0,12])
    .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 = g.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", 0.5)
    .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") // why?
    .attr("y", 6)
    .attr("x", (x(bins[0].x1) - x(bins[0].x0)) / 2)
    .attr("text-anchor", "middle")
    .text(function(d) { return formatCount(d.length); });

g.append("g")
    .attr("class", "axis axis--x")
    .attr("transform", "translate(0," + height + ")")
    .call(d3.axisBottom(x));

</script>

我的图表如下所示：

我尝试将其更改为d3.histogram().domain([0,12])或使用threshhold但仍然没有运气。控制台打印

我的目标：

Bins应该是一个包含八个数组的数组（因为data有八个数组独特的价值观）。
使用正确的x轴显示分档

Answer 1

您需要设置x轴的域：

<div class="general-form">
    <input type="hidden" name="id" ng-model="objectId">
    <label>Name:</label>
    <br>
    <input class="form-control" name="name" placeholder="Name" ng-model="objectName">
    <br>
</div>

工作代码here

D3.js版本4：如何正确设置直方图的x轴间隔

1 个答案: