使用d3.js将x轴移动到图表上的坐标(0,0) [英] move x axis to coordinate (0,0) on the chart with d3.js

问题描述

您可以在此页面上看到我要实现的目标的一个示例.

You can see an example of what I am trying to achieve on this page.

我用此代码构造了负轴和正轴:

I have negative and positive axis constructed with this code:

this.svg = d3.select(el).append("svg")
      .attr("width", width + margin.left + margin.right)
      .attr("height", height + margin.top + margin.bottom)
      .append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

this.xScale = d3.scale.linear()
      .range([0, width]);

this.yScale = d3.scale.linear()
      .range([height, 0]);

const xAxis = d3.svg.axis()
        .scale(this.xScale);

const yAxis = d3.svg.axis()
        .orient('left')
        .scale(this.yScale);

const data = this.getDataFromProps(this.props.expression);

this.xScale.domain(d3.extent(data, function (d) {return d.x;}));
this.yScale.domain(d3.extent(data, function (d) {return d.y;}));

this.svg.append('g')
  .attr('class', 'axis')
  .attr('transform', 'translate(0,' + height + ')')
  .call(xAxis);

this.svg.append('g')
  .attr('class', 'axis')
  .attr('transform', 'translate(' + width/2 + ',0)')
  .call(yAxis);

唯一的问题是x轴指向底部.如何将轴定位在svg的(0，0)?

The only problem is that the x-axis is oriented to the bottom. How can I have the axis positioned at (0, 0) on the svg?

推荐答案

只需对此行进行更改:

this.svg.append('g')
  .attr('class', 'axis')
  .attr('transform', 'translate(0,' + (height/2) + ')')
  .call(xAxis);

将翻译转换为svg高度的一半.

Make the translate to half of the height of svg.

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