D3 Examples - Interactive Scatter

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<!DOCTYPE html>
<html>
<meta charset="utf-8">
​
<!-- Example based on https://bl.ocks.org/mbostock/3887118 -->
<!-- Tooltip example from https://www.d3noob.org/2013/01/adding-tooltips-to-d3js-graph.html -->
​
<style>
body {
  font: 16px sans-serif;
}
​
.axis path,
.axis line {
  fill: none;
  stroke: #fff;
  shape-rendering: crispEdges;
}
​
.dot {
  stroke: #000;
}
​
.tooltip {
  position: absolute;
  padding: 5px 5px;
  pointer-events: none;
  background-color: white;
  border: 1px solid black;
}
​
form {
  position: absolute;
  right: 10px;
  top: 720px;
}
​
label {
  font-size: 20px;
  text-transform: uppercase;
  }
</style>
  
<body>
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
  
<!-- Technology radio buttons -->
<form>
  <label><input type="radio" name="mode" value="Onshore" checked> Onshore Wind</label>
  <label><input type="radio" name="mode" value="Offshore"> Offshore Wind</label>
  <label><input type="radio" name="mode" value="SolarPV"> Solar PV</label>
</form>
  
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 150},
    width = 960 - margin.left - margin.right,
    height = 700 - margin.top - margin.bottom;
​
var nest = d3.nest()
    .key(function (d) { return d.Technology })
    .key(function (d) { return d.Region })
    .key(function (d) { return d.Period });
  
/* 
 * value accessor - returns the value to encode for a given data object.
 * scale - maps value to a visual display encoding, such as a pixel position.
 * map function - maps from data value to display value
 * axis - sets up axis
 */ 
​
// setup x 
var xValue = function(d) { return d.x;}, // data -> value
    xScale = d3.scale.linear().range([0, width]), // value -> display
    xMap = function(d) { return xScale(xValue(d));}, // data -> display
    xAxis = d3.svg.axis().scale(xScale).orient("bottom");
​
// setup y
var yValue = function(d) { return d.Investor_Type; }, // data -> value
    yScale = d3.scale.ordinal()             
//          .domain(["Utilities","Developers","FIs","Large Consumers","Small Consumers","Government"])
            .rangeRoundBands([0,height+100],1), // value -> display
    yMap = function(d) { return yScale(yValue(d)); }, // data -> display
    yAxis = d3.svg.axis().scale(yScale).orient("left");
  
// setup fill color
var cValue = function(d) { return d.Score;},
    color = d3.scale.pow().exponent(2).domain([1,5]).range(["#fff111","blue"]);
​
// add the graph canvas to the body of the webpage
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 + ")");
​
// add the tooltip area to the webpage
var tooltip = d3.select("body").append("div")
    .attr("class", "tooltip")
    .style("opacity", .5);
​
// load data
d3.csv("160208.csv", function(error, data) {
​
  yScale.domain(data.map(function(d) { return d.Investor_Type; }));
​
  // change string (from CSV) into number format
  data.forEach(function(d) {
    d.Value = +d.Value;
    d.Score = +d.Score;
    d.y = +d.y;
    d.x = +d.x;
//    console.log(d);
  });
​
  // don't want dots overlapping axis, so add in buffer to data domain
    xScale.domain([0, 29]);
​
  // x-axis
  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
    .append("text")
      .attr("class", "label")
      .attr("x", width)
      .attr("y", -6)
      .style("text-anchor", "end")
      .text("");
​
  // y-axis
  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("class", "label")
      .attr("y", 5)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Investor Class");
​
  // draw dots
  svg.selectAll(".dot")
      .data(data)
    .enter().append("circle")
      .attr("class", "dot")
      .attr("r", function(d) {return d.Value/500;})
      .attr("cx", xMap)
      .attr("cy", yMap)
      .style("fill", function(d) { return color(cValue(d));}) 
      .on("mouseover", function(d) {
          tooltip.transition()
               .duration(200)
               .style("opacity", 1);
          tooltip.html("Technology: " + d["Technology"] + "<br/>" + "Region: " + d["Region"] 
            + "<br/>" + "Investor: " + d["Investor_Type"] + "<br/>" + "Capacity: " + d.Value + "MW" + "<br/>" + "Market Rating: " + d.Score)
               .style("left", (d3.event.pageX + 5) + "px")
               .style("top", (d3.event.pageY - 28) + "px");
      })
      .on("mouseout", function(d) {
          tooltip.transition()
               .duration(500)
               .style("opacity", 0);
      });
​
  // draw legend
  var legend = svg.selectAll(".legend")
      .data(color.domain())
    .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
​
  // draw legend colored rectangles
  legend.append("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);
​
  // draw legend text
  legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .text(function(d) { return d;})
​
  d3.selectAll("input").on("change", change);
​
  var timeout = setTimeout(function() {
    d3.select("input[value=\"Onshore\"]").property("checked", true).each(change);
  }, 2000);
​
  function change() {
    clearTimeout(timeout);
    if (this.value === "Onshore") transitionOffshore();
    else if (this.value === "Offshore") transitionSolar();
    else transitionOnshore();
  }
​
  function transitionOffshore() {
    var t = svg.transition().duration(750),
        g = t.selectAll(".group").attr("transform", function(d) { return "translate(0," + y0(d.key) + ")"; });
    g.selectAll("circle").attr("x", function(d) { return y1(d.value); });
    g.select(".dot").attr("x", function(d) { return y1(d.values[0].value / 2); })
  }
​
  function transitionSolar() {
    var t = svg.transition().duration(750),
        g = t.selectAll(".group").attr("transform", "translate(0," + y0(y0.domain()[0]) + ")");
    g.selectAll("circle").attr("y", function(d) { return y1(d.value + d.valueOffset); });
    g.select(".dot").attr("y", function(d) { return y1(d.values[0].value / 2 + d.values[0].valueOffset); })
  }
  
  function transitionOnshore(){
    var t = svg.transition().duration(750),
        g = t.selectAll(".dot").attr("r", function(d) { return d.Value/400 });
  }
});
</script>
</body>
</html>
    