折线图轴的D3图例

Question

I have line chart made with the help of d3.js which has axes showing numbers with units such as 0m, 1m 2m, 3m..etc for varios units. I want to show legend for these units such m = mili, n=nano, B = billion etc near the line chart.

Answer 1

Here is the an example of line chart with legends. I am not sure if you are following the same process to draw your line charts as most examples in d3 use the same. But as your question do not have any code so here goes an example anyways.Below is the snippet of how to do so:

var legend = svg.selectAll(".legend")
    .data(cities)
    .enter().append("g")
    .attr("class", "legend")
    .attr("transform", function(d, i) {
      return "translate(0," + i * 20 + ")";
    });

  legend.append("rect")
    .attr("x", width - 18)
    .attr("width", 18)
    .attr("height", 4)
    .style("fill", function(d) {
      return color(d);
    });

  legend.append("text")
    .attr("x", width - 24)
    .attr("y", 6)
    .attr("dy", ".35em")
    .style("text-anchor", "end")
    .text(function(d) {
      return d;
    });