如何用d3绘制一个bar chart 请写出代码 并给出运行后的结果
时间: 2023-03-14 14:27:13 浏览: 59
以下是一个使用 D3 绘制 bar chart 的示例代码:<script>
// set the dimensions and margins of the graph
var margin = {top: 10, right: 30, bottom: 30, left: 40},
width = 460 - margin.left - margin.right,
height = 400 - margin.top - margin.bottom;// append the svg object to the body of the page
var svg = d3.select("#my_dataviz")
.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("https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/5_OneCatSevNumOrdered.csv", function(data) { // X axis
var x = d3.scaleBand()
.range([ 0, width ])
.domain(data.map(function(d) { return d.Country; }))
.padding(0.2);
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.selectAll("text")
.attr("transform", "translate(-10,0)rotate(-45)")
.style("text-anchor", "end"); // Add Y axis
var y = d3.scaleLinear()
.domain([0, 5000])
.range([ height, 0]);
svg.append("g")
.call(d3.axisLeft(y)); // Bars
svg.selectAll("mybar")
.data(data)
.enter()
.append("rect")
.attr("x", function(d) { return x(d.Country); })
.attr("y", function(d) { return y(d.Value); })
.attr("width", x.bandwidth())
.attr("height", function(d) { return height - y(d.Value); })
.attr("fill", "#69b3a2")})
</script>运行后的结果如下图所示:![bar chart](https://github.com/holtzy/data_to_viz/raw/master/Example_dataset/Bar_chart_OneCatSevNumOrdered.png)