将 d3 折线图转换为条形图

Question

D3 newbie here. D3新手在这里。 I have a line chart that looks exactly the way I want it.我有一个折线图，看起来完全符合我的要求。

Here is my code, tweaked a bit, but mostly borrowed from here .这是我的代码，稍微调整了一下，但主要是从这里借来的。 : ：

<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */

.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 2px;
}

</style>
<body>

<!-- load the d3.js library -->
<script src="lib/d3/d3.min.js"></script>
<script src="lib/d3-dsv/d3-dsv.min.js"></script>
<script src="lib/d3-fetch/d3-fetch.min.js"></script>
<script>

// set the dimensions and margins of the graph
var margin = {top: 20, right: 20, bottom: 50, left: 70},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

// parse the date / time
var parseTime = d3.timeParse("%Y");

// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);

// define the line
var valueline = d3.line()
    .x(function(d) { return x(d.year); })
    .y(function(d) { return y(d.running_total); });


// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").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 + ")");

// Get the data
d3.csv("q3.csv").then(function(data) {

  // format the data
  data.forEach(function(d) {
      d.year = parseTime(d.year);
      d.running_total = +d.running_total;
  });
  console.log("d", data)
  // Scale the range of the data
  x.domain(d3.extent(data, function(d) { return d.year; }));
  y.domain([0, d3.max(data, function(d) { return d.running_total; })]);

  // Add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line")
      .attr("d", valueline);

  // Add the x Axis
  svg.append("g")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

  // text label for the x axis
  svg.append("text")
      .attr("transform",
            "translate(" + (width/2) + " ," +
                           (height + margin.top + 20) + ")")
      .style("text-anchor", "middle")
      .text("Year");

  // Add the y Axis
  svg.append("g")
      .call(d3.axisLeft(y));

  // text label for the y axis
  svg.append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 0 - margin.left)
      .attr("x",0 - (height / 2))
      .attr("dy", "1em")
      .style("text-anchor", "middle")
      .text("Running Total");

});

</script>
</body>

And the SVG looks like this: SVG 看起来像这样：

That is all great.这一切都很棒。 Now I want to add bars to the chart as well with the same data.现在我想用相同的数据将条形添加到图表中。 I tried following the example how the valueline were created, but apparently rect can't be created the same way.我尝试按照如何创建valueline的示例进行操作，但显然不能以相同的方式创建rect 。 Here is how I tried it:这是我尝试的方法：

var valuebox = d3.rect()
    .x(function(d) { return x(d.year); })
    .y(function(d) { return y(d.running_total); })
    .width(x.bandwidth)
    .height(function(d) { return height - y(d.running_total); });

Then just after I append the path, I thought I could append my rect.然后就在我附加路径之后，我想我可以附加我的矩形。

  svg.append("g")
      .attr("fill", "steelblue")
      .attr("fill-opacity", 0.8)
    .selectAll("rect")
    .data(data)
    .join("rect")
      .attr("d", d => valuebox)

I appreciate the help!我感谢您的帮助！

Answer 1

I was able to get this by adding the following code below where I was adding the line:我可以通过在下面添加行的位置添加以下代码来获得此信息：

svg.selectAll("bar")
      .data(data)
    .enter().append("rect")
      .style("fill", "steelblue")
      .attr("x", function(d) { return x(d.year); })
      .attr("width", (width/data.length - 1))
      .attr("y", function(d) { return y(d.running_total); })
      .attr("height", function(d) { return height - y(d.running_total); });

将 d3 折线图转换为条形图

问题描述

1 个解决方案

解决方案1
0 已采纳 2020-09-04 00:11:29

将 d3 折线图转换为条形图

问题描述

1 个解决方案

解决方案1 0 已采纳 2020-09-04 00:11:29

解决方案1
0 已采纳 2020-09-04 00:11:29