【JavaScript】D3.js ~ 複合グラフ / 折れ線・縦棒グラフを作成する ~

サンプル

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.bar:hover {
  fill: steelblue;
}

.axis {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.tooltip {
  border: 1px solid #eee;
  background-color: #fff;
  padding: 8px 8px 0 8px;
  border-radius: 3px;
}

path {
  stroke: #00a0e9;
  opacity : 0.95;
}
.line {
  fill: none;
  stroke: red;
  stroke-width: 2px;
}

path {
  stroke: #00a0e9;
  opacity : 0.95;
}

path.linechart {
  stroke-width : 2;
}
</style>
<body>
<script src="">https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js">
<script>

var dataset = [
  {graphId: "001", y1Val: 15, y2Val: 120, graphColor: "aliceblue"},
  {graphId: "002", y1Val: 3, y2Val: 67, graphColor: "lavender"},
  {graphId: "003", y1Val: 22, y2Val: 45, graphColor: "lightsteelblue"},
  {graphId: "004", y1Val: 9, y2Val: 98, graphColor: "lightslategray"},
  {graphId: "005", y1Val: 19, y2Val: 13, graphColor: "slategray"},
  {graphId: "006", y1Val: 15, y2Val: 35, graphColor: "steelblue"},
  {graphId: "007", y1Val: 3, y2Val: 29, graphColor: "royalblue"},
  {graphId: "008", y1Val: 22, y2Val: 76, graphColor: "midnightblue"},
  {graphId: "009", y1Val: 9, y2Val: 89, graphColor: "navy"},
  {graphId: "010", y1Val: 19, y2Val: 112, graphColor: "darkblue"},
];

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

// *** 縦棒グラフ ********

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);

var y = d3.scale.linear()
    .range([height, 0]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(10, "");

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 + ")");


x.domain(dataset.map(function(d) { return d.graphId; }));
y.domain([0, d3.max(dataset, function(d) { return d.y1Val; })]);

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

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
      .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Y value");

var barChart = svg.selectAll(".bar")
  .data(dataset)
  .enter()
  .append("rect")
  .attr("class", "bar")
  .attr("fill", function(d) { return d.graphColor; })
  .attr("x", function(d) { return x(d.graphId); })
  .attr("width", x.rangeBand());
  
// アニメーション
barChart.transition()
  .delay(function (d, i) { return i * 100; })
  .duration(200)
  .attr("y", function(d) { return y(d.y1Val); })
  .attr("height", function(d) { return height - y(d.y1Val); });
  
// ツールチップ
var tooltip = d3.select("body")
  .append("div")
  .attr("class", "tooltip")
  .style("position", "absolute")
  .style("z-index", "10")
  .style("visibility", "hidden");

barChart
  .on("mouseover", function(){
     return tooltip.style("visibility", "visible");
  })
  .on("mousemove", function(d){
    return tooltip
      .style("top", (d3.event.pageY - 10) + "px")
      .style("left",(d3.event.pageX + 10) + "px")
      .html("<span>" + d.graphId + " : " + d.y1Val + "</span>");
    })
  .on("mouseout", function(){
    return tooltip.style("visibility", "hidden");
  });

// *** 折れ線グラフ ********

var yScaleForLine = d3.scale.linear()
    .domain([0, d3.max(dataset, function(d){ return d.y2Val; })])
    .range([height, 0]);

var yAxisForLine = d3.svg.axis()
    .scale(yScaleForLine)
    .orient("right")
    .ticks(4)
    .innerTickSize(-width)
    .outerTickSize(0)
    .tickPadding(4);

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(x);
      
svg.append('g')
    .attr("class", "y axis")
    .attr("transform", "translate(" + width + "," + 0 + ")")
    .call(yAxisForLine)
    .append("text")
    .attr("transform", "rotate(-90)")
    .attr("y", 6)
    .attr("dy", ".71em")
    .style("text-anchor", "end")
    .text("Y2 value");
    
var line = d3.svg.line()
    .x(function(d) { return x(d.graphId); })
    .y(function(d) { return yScaleForLine(d.y2Val); });

var path = svg.append("path")
    .datum(dataset)
    .attr("class", "line")
    .attr("d", line)
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

// 以降は、アニメーションのための設定
var totalLength = path.node().getTotalLength();

path.attr("stroke-dasharray", totalLength + " " + totalLength)
  .attr("stroke-dashoffset", totalLength)
  .transition()
  .duration(1000) // アニメーション速度
  .ease("linear")
  .attr("stroke-dashoffset", 0);
  
</script>


関連記事

D3.js ~ 入門編 ~

http://blogs.yahoo.co.jp/dk521123/35423681.html

D3.js ~ 折れ線グラフを作成する ~

http://blogs.yahoo.co.jp/dk521123/35430148.html

D3.js ~ 縦棒グラフを作成する ~

http://blogs.yahoo.co.jp/dk521123/35435053.html