2017-11-22 18 views
1

現在、私はd3js線とドットチャートを持っています。現時点で私がドット上にマウスを置くと、ドットがハイライト表示され、ディスプレイに値が表示されます。私が見たいと思っているのは、マウスカーソルに最も近いポイントをホバーしてライン上をホバリングし、ポイント上でホバリングしたときと同じ。私は二等分線をチェックしましたが、それが日付のあるデータに対してのみ有効かどうかはわかりません。以下は、チャートとフィドルのリンクです。あなたが欲しいものを行う方法のハイライト最も近い点d3js線と点チャート

https://jsfiddle.net/snt1/56qvqaz9/2/

var margin = {top: 30,right: 20,bottom: 100,left: 80 }, 
      width = 400 - margin.left - margin.right, 
      height = 300 - margin.top - margin.bottom; 



      var svg = d3.select("#charts").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 + ")") 
         .attr("preserveAspectRatio", "xMinYMin meet") 
         .attr("viewBox", "0 0 600 400") 
         //class to make it responsive 
         .classed("svg-content-responsive", true); ; 


     // Set the ranges 

      var x = d3.scaleBand().rangeRound([0, width]).padding(0.1); 
      var y = d3.scaleLinear().range([height, 0]); 
      var xAxis ; 

       function tickLabels(dataLength, d) { 
        if (dataLength > 9) return ""; 
        return d.replace(/^.+_/, '') 
       } 

      /* var xAxis = d3.axisBottom().scale(x) 
           .ticks() 
           .tickFormat(function(d,i) { return tickLabels(toCSV.length, d) })*/ 
      /* 
       var ticks = d3.selectAll(".tick text"); 
       ticks.attr("class", function(d,i){ 
        if(i%3 != 0) d3.select(this).remove(); 
       }); 


       */ 


       if (all.length < 16){ 
       xAxis = d3.axisBottom().scale(x).ticks(10); 
       } 
       else 
        { 
        xAxis = d3.axisBottom().scale(x) 
        .tickFormat(function(d, i) { 
        return i % 3 === 0 ? d : null; 
        }); 
        } 
      //  var xAxis = d3.axisBottom().scale(x).ticks(10); 

       var yAxis = d3.axisLeft().scale(y).ticks(5).tickSizeInner(-width).tickSizeOuter(0).tickPadding(10); 


      // Define the line 

       var valueline = d3.line().curve(d3.curveCatmullRom) 
           .x(function (d) { 
            return x(d.label) + x.bandwidth()/2; 
               }) 
           .y(function (d) { 
            return y(d.value); 
               }); 
       var data = all; 


      // Get the data 
       data.forEach(function (d) { 
         d.value = +d.value; 
       }); 

      // Scale the range of the data 
       x.domain(data.map(function (d) {return d.label;})); 
       y.domain([0, d3.max(data, function (d) {return d.value;})]); 

      // Add the valueline path. 
       svg.append("path") // Add the valueline path. 
       .attr("d", valueline(data)) 
       .attr("class", "line"); 

      // Add the scatterplot 
       svg.selectAll("dot") 
        .data(data) 
       .enter().append("circle") 
        .attr("r", 4) 
        .attr("cx", function (d) {return x(d.label) + x.bandwidth()/2;}) 
        .attr("cy", function(d) { return y(d.value); }).on("mouseover", function() { 
        tooltip.style("display", null); 
        }) 
        /* .on("mouseout", function() { 
         tooltip.transition()  
         .duration(500)  
         .style("opacity", 0); 
         d3.select(this) 
         .attr("fill", "black") 
         .attr("r", 4); 
        }) 

*/

    .on("mouseover", function() { tooltip.style("display", null); }) 
        .on("mouseout", function() { tooltip.style("display", "none"); 
        d3.select(this) 
        .attr("fill", "black") 
        .attr("r", 4);}) 


        .on("mousemove", function(d) { 
         d3.select(this) 
        .attr("fill", "red") 
        .attr("r", 8); 

        tooltip.transition().duration(200) 
        .style("opacity", 0.9); 
         tooltip.select("div").html(d.name +":" +" <br><strong>" + d.value + "</strong>") 
        .style("position", "fixed") 
        .style("text-align", "center") 
        .style("width", "120px") 
        .style("height", "45px") 
        .style("padding", "2px") 
        .style("font", "12px sans-serif") 
        .style("background", "lightsteelblue") 
        .style("border", "0px") 
        .style("border-radius", "8px") 
        .style("left", (d3.event.pageX + 15) + "px") 
        .style("top", (d3.event.pageY - 28) + "px"); 

       }); 
       var tooltip = d3.select("body").append("div") 
       .attr("class", "tooltip") 
       .style("opacity", 0.5); 

      tooltip.append("rect") 
       .attr("width", 30) 
       .attr("height", 20) 
       .attr("fill", "#ffffff") 
       .style("opacity", 0.5); 

      tooltip.append("div") 
       .attr("x", 15) 
       .attr("dy", "1.2em") 
       .style("text-anchor", "middle") 
       .attr("font-size", "1.5em") 
       .attr("font-weight", "bold"); 


     // Add the X Axis 
      svg.append("g") 
      .attr("class", "x axis") 
      .attr("transform", "translate(0," + height + ")") 
       .call(xAxis) 
       .selectAll("text") 
       .style("text-anchor", "end") 
       .attr("dx", "0.1em") 
       .attr("dy", "-1em") 
       .attr("y", 30) 
       .attr("transform", "rotate(-30)"); 


     // Add the Y Axis 
       svg.append("g") 
       .attr("class", "y axis") 
        .call(yAxis); 

       svg.append("text") 
       .attr("transform", "rotate(-90)") 
       .attr("y",-30) 
       .attr("x", 0 - (height/2)) 
       .attr("dy", "-2em") 
       .attr("text-anchor", "middle") 
       .style("font-size", "13px") 
       .text("Count"); 

答えて

1

たくさん。ライン上のマウスオーバー位置に最も近い点のために、この溶液ブルートフォース検索は:

<!DOCTYPE html> 
 
<html> 
 

 
<head> 
 
    <script data-require="[email protected]" data-semver="4.0.0" src="https://d3js.org/d3.v4.min.js"></script> 
 
    <style> 
 
     .chart { 
 
     background: #eee; 
 
     padding: 3px; 
 
    } 
 
    
 
    .chart div { 
 
     width: 0; 
 
     transition: all 1s ease-out; 
 
     -moz-transition: all 1s ease-out; 
 
     -webkit-transition: all 1s ease-out; 
 
    } 
 
    
 
    .chart div { 
 
     font: 10px sans-serif; 
 
     background-color: steelblue; 
 
     text-align: right; 
 
     padding: 3px; 
 
     margin: 5px; 
 
     color: white; 
 
     box-shadow: 2px 2px 2px #666; 
 
    } 
 
    
 
    .bar { 
 
     fill: orange; 
 
    } 
 
    
 
    .bar:hover { 
 
     fill: red; 
 
    } 
 
    
 
    rect.background { 
 
     fill: white; 
 
    } 
 
    
 
    .axis { 
 
     shape-rendering: crispEdges; 
 
    } 
 
    
 
    .axis path, 
 
    .axis line { 
 
     fill: none; 
 
     stroke: #000; 
 
    } 
 
    
 
    tooltip { 
 
     position: absolute; 
 
     text-align: center; 
 
     width: 120px; 
 
     height: 45px; 
 
     padding: 2px; 
 
     font: 12px sans-serif; 
 
     background: lightsteelblue; 
 
     border: 0px; 
 
     border-radius: 8px; 
 
     pointer-events: none; 
 
    } 
 
    
 
    bar { 
 
     fill: #8CD3DD; 
 
    } 
 
    
 
    bar:hover { 
 
     fill: #F56C4E; 
 
    } 
 
    /* .tick:nth-child(3n) text { 
 
    visibility: hidden; 
 
} */ 
 
    
 
    .d3-tip { 
 
     line-height: 1; 
 
     font-weight: bold; 
 
     padding: 12px; 
 
     background: rgba(0, 0, 0, 0.8); 
 
     color: #fff; 
 
     border-radius: 2px; 
 
    } 
 
    /* Creates a small triangle extender for the tooltip */ 
 
    
 
    .d3-tip:after { 
 
     box-sizing: border-box; 
 
     display: inline; 
 
     font-size: 10px; 
 
     width: 100%; 
 
     line-height: 1; 
 
     color: rgba(0, 0, 0, 0.8); 
 
     content: "\25BC"; 
 
     position: absolute; 
 
     text-align: center; 
 
    } 
 
    /* Style northward tooltips differently */ 
 
    
 
    .d3-tip.n:after { 
 
     margin: -1px 0 0 0; 
 
     top: 100%; 
 
     left: 0; 
 
    } 
 
    
 
    Creates a small triangle extender for the tooltip .d3-tip:after { 
 
     box-sizing: border-box; 
 
     display: inline; 
 
     font-size: 10px; 
 
     width: 100%; 
 
     line-height: 1; 
 
     color: rgba(0, 0, 0, 0.8); 
 
     content: "\25BC"; 
 
     position: absolute; 
 
     text-align: center; 
 
    } 
 
    
 
    Style northward tooltips differently .d3-tip.n:after { 
 
     margin: -1px 0 0 0; 
 
     top: 100%; 
 
     left: 0; 
 
    } 
 
    
 
    svg text.label { 
 
     fill: #ff0000; 
 
     font: 25px; 
 
     text-anchor: middle; 
 
     font-weight: 400; 
 
     text-anchor: middle; 
 
     font-size: 125%; 
 
     text-anchor: start; 
 
    } 
 
    
 
    path { 
 
     stroke: steelblue; 
 
     stroke-width: 2; 
 
     /* fill: none; */ 
 
     /* commenting out to show multiple ring donut chart. */ 
 
    } 
 
    
 
    pathline { 
 
     fill: none; 
 
     stroke-width: 2; 
 
     stroke: #000; 
 
    } 
 
    
 
    .axis path, 
 
    .axis line { 
 
     fill: none; 
 
     stroke: grey; 
 
     stroke-width: 1; 
 
     shape-rendering: crispEdges; 
 
    } 
 
    
 
    .graph { 
 
     width: auto; 
 
    } 
 
    
 
    .tooltip { 
 
     color: black; 
 
    } 
 
    
 
    .axis { 
 
     font: 12px sans-serif, Georgia, Arial; 
 
    } 
 
    
 
    .axis path, 
 
    .axis line { 
 
     fill: none; 
 
     stroke: #dadada; 
 
     shape-rendering: crispEdges; 
 
    } 
 
    /* ANGULAR MODAL */ 
 
    
 
    .dialogdemoBasicUsage #popupContainer { 
 
     position: relative; 
 
    } 
 
    
 
    .dialogdemoBasicUsage .footer { 
 
     width: 100%; 
 
     text-align: center; 
 
     margin-left: 20px; 
 
    } 
 
    
 
    .dialogdemoBasicUsage .footer, 
 
    .dialogdemoBasicUsage .footer > code { 
 
     font-size: 0.8em; 
 
     margin-top: 50px; 
 
    } 
 
    
 
    .dialogdemoBasicUsage button { 
 
     width: 200px; 
 
    } 
 
    
 
    .dialogdemoBasicUsage div#status { 
 
     color: #c60008; 
 
    } 
 
    
 
    .dialogdemoBasicUsage .dialog-demo-prerendered md-checkbox { 
 
     margin-bottom: 0; 
 
    } 
 
    /* Angular grids */ 
 
    
 
    .gridListdemoBasicUsage md-grid-list { 
 
     margin: 8px; 
 
    } 
 
    
 
    gridListdemoBasicUsage .gray { 
 
     background: #f5f5f5; 
 
    } 
 
    
 
    .gridListdemoBasicUsage .green { 
 
     background: #b9f6ca; 
 
    } 
 
    
 
    .gridListdemoBasicUsage .yellow { 
 
     background: #ffff8d; 
 
    } 
 
    
 
    .gridListdemoBasicUsage .blue { 
 
     background: #84ffff; 
 
    } 
 
    
 
    .gridListdemoBasicUsage .purple { 
 
     background: #b388ff; 
 
    } 
 
    
 
    .gridListdemoBasicUsage .red { 
 
     background: #ff8a80; 
 
    } 
 
    
 
    .gridListdemoBasicUsage md-grid-tile { 
 
     transition: all 400ms ease-out 50ms; 
 
    } 
 
    
 
    md-grid-list md-grid-tile md-grid-tile-footer, 
 
    md-grid-list md-grid-tile md-grid-tile-header { 
 
     height: 25px; 
 
    } 
 
    
 
    .svg-container { 
 
     display: inline-block; 
 
     position: relative; 
 
     width: 100%; 
 
     padding-bottom: 12%; 
 
     vertical-align: top; 
 
     overflow: hidden; 
 
    } 
 
    
 
    .line { 
 
     fill: none; 
 
     stroke: steelblue; 
 
     stroke-width: 3px; 
 
    } 
 
    
 
    .svg-content-responsive { 
 
     display: inline-block; 
 
     position: absolute; 
 
     top: 10px; 
 
     left: 0; 
 
    } 
 
    
 
    .svg-content { 
 
     display: inline-block; 
 
     position: absolute; 
 
     top: 0; 
 
     left: 0; 
 
    } 
 
    
 
    #linechart { 
 
     width: 100%; 
 
     height: 100%; 
 
     position: absolute; 
 
    } 
 
    /* TESTING GRIDS */ 
 
    
 
    .chart-tile { 
 
     display: block; 
 
     height: 100%; 
 
     width: 100%; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles .s64 { 
 
     font-size: 64px; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles .s32 { 
 
     font-size: 48px; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles md-grid-list { 
 
     margin: 8px; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles md-grid-tile { 
 
     box-shadow: 2px 2px 3px 3px #888888; 
 
     transition: all 300ms ease-out 50ms; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles md-grid-tile md-grid-tile-footer { 
 
     background: rgba(0, 0, 0, 0.68); 
 
     height: 36px; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles md-grid-tile-footer figcaption { 
 
     width: 100%; 
 
    } 
 
    
 
    .gridListdemoDynamicTiles md-grid-tile-footer figcaption h3 { 
 
     margin: 0; 
 
     font-weight: 700; 
 
     width: 100%; 
 
     text-align: center; 
 
    } 
 
    /* 
 
Copyright 2016 Google Inc. All Rights Reserved. 
 
Use of this source code is governed by an MIT-style license that can be in foundin the LICENSE file at https://material.angularjs.org/license. 
 
*/ 
 
    
 
    @media (min-width: 1200px) { 
 
     .container { 
 
     width: 1400px; 
 
     margin-right: -50px; 
 
     } 
 
    } 
 
    
 
    @media only screen and (max-width: 260px) and (min-width: 1600px) { 
 
     .container { 
 
     width: 1700px; 
 
     margin-right: -50px; 
 
     } 
 
    } 
 
    
 
    #wrapper { 
 
     border-style: solid; 
 
     height: 100px; 
 
     width: 200px; 
 
    } 
 
    
 
    #dropdown { 
 
     vertical-align: middle; 
 
     width: 80px; 
 
     margin-left: 300px; 
 
     margin-top: -30px; 
 
    } 
 
    /* Styles go here */ 
 
    
 
    .gridster-item { 
 
     background-color: darkgrey; 
 
    } 
 
    
 
    .my-class { 
 
     border: 1px solid red; 
 
     height: 50px; 
 
    } 
 
    
 
    body { 
 
     background-color: #fcfcfc; 
 
    } 
 
    
 
    .container { 
 
     text-align: center; 
 
     padding: 15px; 
 
    } 
 
    
 
    .left-div { 
 
     display: inline-block; 
 
     max-width: 300px; 
 
     text-align: left; 
 
     padding: 30px; 
 
     background-color: #ddd; 
 
     border-radius: 3px; 
 
     margin: 15px; 
 
     vertical-align: top; 
 
    } 
 
    
 
    .right-div { 
 
     display: inline-block; 
 
     max-width: 150px; 
 
     text-align: left; 
 
     padding: 30px; 
 
     background-color: #ddd; 
 
     border-radius: 3px; 
 
     margin: 15px; 
 
    } 
 
    
 
    .left-text, 
 
    .right-text { 
 
     font: 300 16px/1.6 'Helvetica Neue' sans-serif; 
 
     color: #333; 
 
    } 
 
    
 
    @media screen and (max-width: 600px) { 
 
     .left-div, .right-div { 
 
     max-width: 100%; 
 
     } 
 
    </style> 
 
</head> 
 

 
<body> 
 
    <div id="charts"> 
 

 
    </div> 
 
    <script> 
 
    var all = [{ 
 
     "name": "SEASONAL_LYQ1", 
 
     "code": "SEASONAL_LYQ1", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "0", 
 
     "label": "LYQ1", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_LYQ2", 
 
     "code": "SEASONAL_LYQ2", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "10", 
 
     "label": "LYQ2", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_LYQ3", 
 
     "code": "SEASONAL_LYQ3", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "16", 
 
     "label": "LYQ3", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_LYQ4", 
 
     "code": "SEASONAL_LYQ4", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "10", 
 
     "label": "LYQ4", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_CYQ1", 
 
     "code": "SEASONAL_CYQ1", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "0", 
 
     "label": "CYQ1", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_CYQ2", 
 
     "code": "SEASONAL_CYQ2", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "10", 
 
     "label": "CYQ2", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_CYQ3", 
 
     "code": "SEASONAL_CYQ3", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "16", 
 
     "label": "CYQ3", 
 
     "children": [] 
 
    }, { 
 
     "name": "SEASONAL_CYQ4", 
 
     "code": "SEASONAL_CYQ4", 
 
     "parent": "SEASONAL_POP", 
 
     "value": "10", 
 
     "label": "CYQ4", 
 
     "children": [] 
 
    }]; 
 
    var margin = { 
 
     top: 30, 
 
     right: 20, 
 
     bottom: 100, 
 
     left: 80 
 
     }, 
 
     width = 400 - margin.left - margin.right, 
 
     height = 300 - margin.top - margin.bottom; 
 

 

 

 
    var svg = d3.select("#charts").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 + ")") 
 
     .attr("preserveAspectRatio", "xMinYMin meet") 
 
     .attr("viewBox", "0 0 600 400") 
 
     //class to make it responsive 
 
     .classed("svg-content-responsive", true);; 
 

 

 
    // Set the ranges 
 

 
    var x = d3.scaleBand().rangeRound([0, width]).padding(0.1); 
 
    var y = d3.scaleLinear().range([height, 0]); 
 
    var xAxis; 
 

 
    function tickLabels(dataLength, d) { 
 
     if (dataLength > 9) return ""; 
 
     return d.replace(/^.+_/, '') 
 
    } 
 

 
    /* var xAxis = d3.axisBottom().scale(x) 
 
\t    \t \t \t \t \t .ticks() 
 
\t \t \t \t    \t \t .tickFormat(function(d,i) { return tickLabels(toCSV.length, d) })*/ 
 
    /* 
 
\t \t   var ticks = d3.selectAll(".tick text"); 
 
\t \t   ticks.attr("class", function(d,i){ 
 
\t \t    if(i%3 != 0) d3.select(this).remove(); 
 
\t \t   }); 
 
\t \t    
 
\t \t    
 
\t \t   */ 
 

 

 
    if (all.length < 16) { 
 
     xAxis = d3.axisBottom().scale(x).ticks(10); 
 
    } else { 
 
     xAxis = d3.axisBottom().scale(x) 
 
     .tickFormat(function(d, i) { 
 
      return i % 3 === 0 ? d : null; 
 
     }); 
 
    } 
 
    //  var xAxis = d3.axisBottom().scale(x).ticks(10); 
 

 
    var yAxis = d3.axisLeft().scale(y).ticks(5).tickSizeInner(-width).tickSizeOuter(0).tickPadding(10); 
 

 

 
    // Define the line 
 

 
    var valueline = d3.line().curve(d3.curveCatmullRom) 
 
     .x(function(d) { 
 
     return x(d.label) + x.bandwidth()/2; 
 
     }) 
 
     .y(function(d) { 
 
     return y(d.value); 
 
     }); 
 
    var data = all; 
 

 

 
    // Get the data 
 
    data.forEach(function(d) { 
 
     d.value = +d.value; 
 
    }); 
 

 
    // Scale the range of the data 
 
    x.domain(data.map(function(d) { 
 
     return d.label; 
 
    })); 
 
    y.domain([0, d3.max(data, function(d) { 
 
     return d.value; 
 
    })]); 
 

 
    // Add the valueline path. 
 
    svg.append("path") // Add the valueline path. 
 
     .attr("d", valueline(data)) 
 
     .attr("class", "line") 
 
     .on("mouseover", function(d) { 
 
     var mx = d3.mouse(svg.node())[0], 
 
      c = 1e10, 
 
      idx = -1; 
 
     xs.forEach(function(x, i) { 
 
      var dis = Math.abs(x - mx); 
 
      if (dis < c) { 
 
      c = dis; 
 
      idx = i; 
 
      } 
 
     }); 
 
     var dot = dots.nodes()[idx], 
 
      d3Dot = d3.select(dot); 
 
     d3Dot.on("mouseover").call(dot, d3Dot.datum()); 
 
     }) 
 
     .on("mouseout", function(d){ 
 
     tooltip.style("display", "none"); 
 
     dots 
 
      .attr("fill", "black") 
 
      .attr("r", 4); 
 
     }) 
 

 

 
    var xs = []; 
 
    // Add the scatterplot 
 
    var dots = svg.selectAll(".dot") 
 
     .data(data) 
 
     .enter().append("circle") 
 
     .attr("class", "dot") 
 
     .attr("r", 4) 
 
     .attr("cx", function(d) { 
 
     var xp = x(d.label) + x.bandwidth()/2; 
 
     xs.push(xp); 
 
     return xp; 
 
     }) 
 
     .attr("cy", function(d) { 
 
     return y(d.value); 
 
     }) 
 
     .on("mouseout", function() { 
 
     tooltip.style("display", "none"); 
 
     d3.select(this) 
 
      .attr("fill", "black") 
 
      .attr("r", 4); 
 
     }) 
 
     .on("mouseover", function(d) { 
 
     
 
     tooltip.style("display", "block"); 
 

 
     var self = d3.select(this); 
 

 
     self 
 
      .attr("fill", "red") 
 
      .attr("r", 8); 
 

 
     tooltip.transition().duration(200) 
 
      .style("opacity", 0.9); 
 

 
     tooltip.select("div").html(d.name + ":" + " <br><strong>" + d.value + "</strong>") 
 
      .style("position", "fixed") 
 
      .style("text-align", "center") 
 
      .style("width", "120px") 
 
      .style("height", "45px") 
 
      .style("padding", "2px") 
 
      .style("font", "12px sans-serif") 
 
      .style("background", "lightsteelblue") 
 
      .style("border", "0px") 
 
      .style("border-radius", "8px") 
 
      .style("left", (+self.attr('cx') + 100) + "px") 
 
      .style("top", (+self.attr('cy')) + "px"); 
 
     }); 
 

 
    var tooltip = d3.select("body").append("div") 
 
     .attr("class", "tooltip") 
 
     .style("opacity", 0.5); 
 

 
    tooltip.append("rect") 
 
     .attr("width", 30) 
 
     .attr("height", 20) 
 
     .attr("fill", "#ffffff") 
 
     .style("opacity", 0.5); 
 

 
    tooltip.append("div") 
 
     .attr("x", 15) 
 
     .attr("dy", "1.2em") 
 
     .style("text-anchor", "middle") 
 
     .attr("font-size", "1.5em") 
 
     .attr("font-weight", "bold"); 
 

 

 
    // Add the X Axis 
 
    svg.append("g") 
 
     .attr("class", "x axis") 
 
     .attr("transform", "translate(0," + height + ")") 
 
     .call(xAxis) 
 
     .selectAll("text") 
 
     .style("text-anchor", "end") 
 
     .attr("dx", "0.1em") 
 
     .attr("dy", "-1em") 
 
     .attr("y", 30) 
 
     .attr("transform", "rotate(-30)"); 
 

 

 
    // Add the Y Axis 
 
    svg.append("g") 
 
     .attr("class", "y axis") 
 
     .call(yAxis); 
 

 
    svg.append("text") 
 
     .attr("transform", "rotate(-90)") 
 
     .attr("y", -30) 
 
     .attr("x", 0 - (height/2)) 
 
     .attr("dy", "-2em") 
 
     .attr("text-anchor", "middle") 
 
     .style("font-size", "13px") 
 
     .text("Count"); 
 
    </script> 
 
</body> 
 

 
</html>

.attr("class", "line") 
    .on("mouseover", function(d) { 
    var mx = d3.mouse(svg.node())[0], // x position of cursor 
     c = 1e10, 
     idx = -1; 
    xs.forEach(function(x, i) { //xs is an array of points x location 
     var dis = Math.abs(x - mx); //distance 
     if (dis < c) { 
     c = dis; 
     idx = i; // find closest 
     } 
    }); 
    var dot = dots.nodes()[idx], //get dot 
     d3Dot = d3.select(dot); 
    d3Dot.on("mouseover").call(dot, d3Dot.datum()); //call it's mouseover event 
    }) 
    .on("mouseout", function(d){ 
    tooltip.style("display", "none"); 
    dots 
     .attr("fill", "black") 
     .attr("r", 4); 
    }); 

コードを実行します

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