Question

我有一张我一直在制作的图表，但出于某种原因，它没有显示为面积图 - 至少，不是很顺利。它非常灵巧，看起来不太好。我的数据点很奇怪，但有没有办法让它们更顺利地过渡？

查看图表的外观

我希望它看起来更像这个图表：http://bl.ocks.org/mbostock/1667367（我复制了这部分代码的大部分内容，所以我不确定为什么它以这种奇怪的方式显示。）

谢谢！

以下是完整代码。作为参考，每个时间点（每3小时）都有数据点。

function InitChart() {

  var lineData = [];
  for (i = 0; i < Math.round(totaltime / interval); i++)
  {
    lineData[i] = {
      "timeinterval": Date.now() - (i * interval * 1000),
      "reactionrate": reactionratebyinterval[i],
      "reach": reachbyinterval[i],
      "engagement": engagementbyinterval[i]
    };
  }

  var margin = {top: 10, right: 10, bottom: 100, left: 40},
      margin2 = {top: 430, right: 10, bottom: 20, left: 40},
      width = 960 - margin.left - margin.right,
      height = 500 - margin.top - margin.bottom,
      height2 = 500 - margin2.top - margin2.bottom;

  var parseDate = d3.time.format("%b %Y").parse;

  var x = d3.time.scale().range([0, width]),
      x2 = d3.time.scale().range([0, width]),
      y = d3.scale.linear().range([height, 0]),
      y2 = d3.scale.linear().range([height2, 0]);

  var xAxis = d3.svg.axis().scale(x).orient("bottom"),
      xAxis2 = d3.svg.axis().scale(x2).orient("bottom"),
      yAxis = d3.svg.axis().scale(y).orient("left").ticks(5);

  var brush = d3.svg.brush()
      .x(x2)
      .on("brush", brushed);

  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 + ")");

  svg.append("defs").append("clipPath")
      .attr("id", "clip")
    .append("rect")
      .attr("width", width)
      .attr("height", height);

  var focus = svg.append("g")
      .attr("class", "focus")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

  var context = svg.append("g")
      .attr("class", "context")
      .attr("transform", "translate(" + margin2.left + "," + margin2.top + ")");

  var data = lineData;

  var areareach = d3.svg.area()
      .x(function(d) { return x(d.timeinterval); })
      .y0(height)
      .y1(function(d) { return y(d.reach); })
      .interpolate("monotone");

  var areaengagement = d3.svg.area()
      .x(function(d) { return x(d.timeinterval); })
      .y0(height)
      .y1(function(d) { return y(d.engagement); })
      .interpolate("monotone");

  var areareachbrush = d3.svg.area()
      .x(function(d) { return x2(d.timeinterval); })
      .y0(height2)
      .y1(function(d) { return y2(d.reach); })
      .interpolate("monotone");

  var areaengagementbrush = d3.svg.area()
      .x(function(d) { return x2(d.timeinterval); })
      .y0(height2)
      .y1(function(d) { return y2(d.engagement); })
      .interpolate("monotone");

  x.domain(d3.extent(data.map(function(d) { return d.timeinterval; })));
  y.domain([0, d3.max(data.map(function(d) { return d.reach; }))]);
  x2.domain(x.domain());
  y2.domain(y.domain());

  focus.append("path")
      .datum(data)
      .attr("class", "areareach")
      .attr("d", areareach);  

  focus.append("path")
      .datum(data)
      .attr("class", "areaengagement")
      .attr("d", areaengagement);

  focus.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

  focus.append("g")
      .attr("class", "y axis")
      .call(yAxis);

  context.append("path")
      .datum(data)
      .attr("class", "areareach")
      .attr("d", areareachbrush);

  context.append("path")
      .datum(data)
      .attr("class", "areaengagement")
      .attr("d", areaengagementbrush);

  context.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height2 + ")")
      .call(xAxis2);

  context.append("g")
      .attr("class", "x brush")
      .call(brush)
    .selectAll("rect")
      .attr("y", -6)
      .attr("height", height2 + 7);

  function brushed() {
    x.domain(brush.empty() ? x2.domain() : brush.extent());
    focus.select(".areareach").attr("d", areareach);
    focus.select(".areaengagement").attr("d", areaengagement);
    focus.select(".x.axis").call(xAxis);
  }
}

面积图看起来也是＆＃34; spikey＆＃34;

0 个答案: