d3.js的焦点+上下文通过刷多个路径不显示

Question

我在一些代码中引用了这个stackoverflow链接，但由于某些原因，在我的图表上，当我尝试放大时，图表会消失。我试着把代码和数据放在这个Vida文档中，但可视化效果不会完全显示出来，我仍然无法解决这个问题。谢谢你的帮助！

svg {
font: 10px sans-serif;
}
path {
fill:none;
stroke:white;
stroke-width:2px;
}
.axis path, .axis line {
fill: none;
stroke: #CCC;
shape-rendering: crispEdges;
}
.brush .extent {
stroke: #fff;
fill-opacity: .125;
shape-rendering: crispEdges;
}
.path_H2O {
stroke:green;
}
.path_OH- {
stroke:red;
}
.path_Ca3SiO5 {
stroke:yellow;
} 

---

var margin = {top: 10, right: 20, bottom: 100, left: 40},
margin2 = {top: 630, right: 20, bottom: 20, left: 40},
width = 1600 - margin.left - margin.right,
height = 700 - margin.top - margin.bottom,
height2 = 700 - margin2.top - margin2.bottom;
var x = d3.scale.linear().range([0, width]),
x2 = d3.scale.linear().range([0, width]),
y = d3.scale.linear().range([height, 0]),
y2 = d3.scale.linear().range([height2, 0]);
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
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");
var brush = d3.svg.brush()
.x(x2)
.on("brush", brush);

var area = function (Concent) {
return d3.svg.area()
.interpolate("step")
.x(function(d) { return x(d.Time); })
.y0(height)
.y1(function(d) { return y(d[Concent]); });
};
var area2 = function (Concent) {
return d3.svg.area()
.interpolate("step")
.x(function(d) { return x2(d.Time); })
.y0(height2)
.y1(function(d) { return y2(d[Concent]); });
};
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
svg.append("defs").append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", width)
.attr("height", height);
var focus = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var context = svg.append("g")
.attr("transform", "translate(" + margin2.left + "," + margin2.top + ")");
var myfunc = function(Time, data){
color.domain(d3.keys(data[0]).filter(function(key) { return key !== "Time"; }));
 data.forEach(function(d){
      var y0 = 0; });
       /* d.concent = color.domain().map(function(name) { return {name: name, y0: y0, y1: y0 += +d[name]}; });
        d.total = d.concent[d.concent.length - 1].y1;});
      dataset=data;*/
      console.log(Time, data);
x.domain(d3.extent(data.map(function(d) { return d.Time; })));
y.domain([0, d3.max(data.map(function(d) { return d.H2O; }))]);
x2.domain(x.domain());
y2.domain(y.domain());

focus.selectAll('path')
    .data(['H2O', 'OH-', 'Ca3SiO5'])
  .enter()
    .append('path')
    .attr('clip-path', 'url(#clip)')
    .attr('d', function (col) {
      return area(col)(data);
    })
    .attr('class', function (col) {
      return "path_" + col + " data";
    });
focus.append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis);
focus.append("g")
  .attr("class", "y axis")
  .call(yAxis);
  context.selectAll('path')
     .data(['H2O', 'OH-', 'Ca3SiO5'])
  .enter()
    .append('path')
    .attr('d', function (col) {
      return area2(col)(data);
    })
    .attr('class', function (col) {
      return "path_" + col;
    });
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.selectAll("path.data").attr("d", function (col) { return area(col)(data); });
    focus.select(".x.axis").call(xAxis);
}
};
var data= d3.json([
{
"Time":0,
"H2O":0.7223999972,
"Ca3SiO5":0.2775999921,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":0,
"H3SiO4-":0,
"Ca++":0,
"CaOH+":0,
"OH-":0,
"Vacancy":"0"
},
{
"Time":0,
"H2O":0.7223999972,
"Ca3SiO5":0.2775999921,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":0,
"H3SiO4-":0,
"Ca++":0,
"CaOH+":0,
"OH-":0,
"Vacancy":"0"
},
{
"Time":0.1011666667,
"H2O":0.722445376,
"Ca3SiO5":0.2775546219,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":1.66E-006,
"H3SiO4-":0.0007145257,
"Ca++":0.0021455429,
"CaOH+":3.01E-006,
"OH-":0.0035762526,
"Vacancy":"0"
},
{
"Time":0.2025,
"H2O":0.7224635218,
"Ca3SiO5":0.277536476,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":5.77E-006,
"H3SiO4-":0.000996856,
"Ca++":0.0029978343,
"CaOH+":1.00E-005,
"OH-":0.0049973131,
"Vacancy":"0"
},
{
"Time":0.3038333333,
"H2O":0.7224757574,
"Ca3SiO5":0.2775242411,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":1.19E-005,
"H3SiO4-":0.001183896,
"Ca++":0.0035669817,
"CaOH+":2.03E-005,
"OH-":0.005946632,
"Vacancy":"0"
},
{
"Time":0.4051666667,
"H2O":0.722485082,
"Ca3SiO5":0.277514916,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":1.92E-005,
"H3SiO4-":0.0013237783,
"Ca++":0.0039957417,
"CaOH+":3.31E-005,
"OH-":0.0066624743,
"Vacancy":"0"
},
{
"Time":0.5065,
"H2O":0.7224926814,
"Ca3SiO5":0.2775073166,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":2.77E-005,
"H3SiO4-":0.0014351806,
"Ca++":0.0043407829,
"CaOH+":4.80E-005,
"OH-":0.0072388754,
"Vacancy":"0"
},
{
"Time":0.611,
"H2O":0.7224993205,
"Ca3SiO5":0.2775006773,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":3.68E-005,
"H3SiO4-":0.0015308949,
"Ca++":0.0046383714,
"CaOH+":6.48E-005,
"OH-":0.0077369817,
"Vacancy":"0"
},
{
"Time":0.7155,
"H2O":0.7225050948,
"Ca3SiO5":0.2774949035,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":4.60E-005,
"H3SiO4-":0.0016128709,
"Ca++":0.0048938526,
"CaOH+":8.27E-005,
"OH-":0.0081655806,
"Vacancy":"0"
},
{
"Time":0.82,
"H2O":0.7225102312,
"Ca3SiO5":0.2774897666,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":5.54E-005,
"H3SiO4-":0.0016845349,
"Ca++":0.0051181417,
"CaOH+":0.0001016937,
"OH-":0.0085426217,
"Vacancy":"0"
},
{
"Time":0.9245,
"H2O":0.722514876,
"Ca3SiO5":0.2774851215,
"Ca(OH)2":0,
"CSH(II)":0,
"H2SiO4--":6.52E-005,
"H3SiO4-":0.0017480743,
"Ca++":0.0053181429,
"CaOH+":0.0001216663,
"OH-":0.0088794869,
"Vacancy":"0"
};
],myfunc);

关于完整的数据集，请参阅我发布的vida文档。谢谢

Answer 1

我在这里发布我的努力，因为在一个更大的框中键入所有需要的内容更容易，如果没有其他内容的话。我创建了一个FIDDLE来帮助我们。几点：

1. 我不得不更改variable/myfunc策略，因为它不起作用。你需要告诉我这是否真的有效。线条相当平坦，但你的数据似乎显示出幅度的变化很小，也许对缩放比例进行一些调整可能会有所帮助
2. 您正在调用brush，但您的函数被称为brushed。。。这个变化足以激活画笔来完成它的工作

好吧，让我们看看你怎么说。我希望这能有所帮助。