D3 V4多线形图，带有在角度cli中的散点图

Question

我正在使用D3图表库通过Angular-cli创建图表。 D3版本是4.2.2 。 以下是我要创建的多折线图。

import {Directive, ElementRef} from '@angular/core';
import * as D3 from 'd3';

@Directive({
  selector: 'bar-graph'
})

export class BarGraphDirective {

  private htmlElement:HTMLElement;

  constructor(elementRef:ElementRef) {
    this.htmlElement = elementRef.nativeElement;  // reference to <bar-graph> element from the main template
    console.log(this.htmlElement);
    console.log(D3);

    let d3:any = D3;

    var data = [{
      "date": "2016-10-01",
      "sales": 110,
      "searches": 67
    }, {
      "date": "2016-10-02",
      "sales": 120,
      "searches": 67
    }, {
      "date": "2016-10-03",
      "sales": 125,
      "searches": 69.4
    }, {
      "date": "2016-10-04",
      "sales": 100,
      "searches": 67
    },{
      "date": "2016-10-05",
      "sales": 99,
      "searches": 66
    },{
      "date": "2016-10-06",
      "sales": 131,
      "searches": 67
    },{
      "date": "2016-10-07",
      "sales": 111,
      "searches": 47
    },{
      "date": "2016-10-08",
      "sales": 110,
      "searches": 67
    },{
      "date": "2016-10-09",
      "sales": 130,
      "searches": 67
    },{
      "date": "2016-10-10",
      "sales": 110,
      "searches": 67
    },{
      "date": "2016-10-11",
      "sales": 110,
      "searches": 67
    }];

    // set the dimensions and margins of the graph
    var margin = {
        top: 20,
        right: 80,
        bottom: 30,
        left: 50
      },
      width = 960 - margin.left - margin.right,
      height = 500 - margin.top - margin.bottom;

    // parse the date / time
    var parseDate = d3.timeParse("%Y-%m-%d");

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

    // define the line
    var line = d3.line()
      .x(function (d) {
        return x(d.date);
      })
      .y(function (d) {
        return y(d.sales);
      });

    var svg = d3.select(this.htmlElement).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 + ")");


    // format the data
    data.forEach(function (d) {
      d.date = parseDate(d.date);
    });

    x.domain(d3.extent(data, function (d) {
      return d.date;
    }));

    y.domain([0, d3.max(data, function (d) {
      return d.sales > d.searches ? d.sales : d.searches;
    })]);

    // Add the line path.
    svg.append("path")
      .attr("class", "line")
      .style("fill", "none")
      .attr("d", line(data))
      .style("stroke", "orange");

    // change line to look at searches
    line.y(function (d) {
      return y(d.searches);
    });

    // Add the second line path.
    svg.append("path")
      .attr("class", "line")
      .style("fill", "none")
      .attr("d", line(data))
      .style("stroke", "steelblue");

    // Add the scatterplot
    svg.selectAll("dot")
        .data(data)
      .enter().append("circle")
        .attr("r", 5)
        .attr("cx", function(d) { return x(d.date); })
        .attr("cy", function(d) { return y(d.sales); });

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

    // Add the Y Axis
    svg.append("g")
      .call(d3.axisLeft(y))
      .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Price ($)");

  }
}

然后我的图表如下所示。

如何在两条线上都添加散点图，以及如何更改散点图的颜色？

任何建议，高度赞赏。

谢谢

Answer 1

// Add sales to the scatterplot
    svg.selectAll(".sales-circle")
        .data(data)
      .enter().append("circle")
        .attr('class', 'sales-circle')
        .attr("r", 5)
        .attr("cx", function(d) { return x(d.date); })
        .attr("cy", function(d) { return y(d.sales); })
        .style("fill", "orange");

// Add searches to the scatterplot
    svg.selectAll(".searches-circle")
        .data(data)
      .enter().append("circle")
        .attr("r", 5)
        .attr('class', 'searches-circle')
        .attr("cx", function(d) { return x(d.date); })
        .attr("cy", function(d) { return y(d. searches); })
        .style("fill", "steelblue");