Ch. 4, Fig. 16 - D3.js in Action

This is the code for Chapter 4, Figure 16 from D3.js in Action that draws a boxplot using numerous SVG elements appended to a g element and drawn based on the datapoint bound to that g element.

<html>
<head>
  <title>D3 in Action Chapter 4 - Example 8</title>
  <meta charset="utf-8" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
</head>
<style>
  svg {
    height: 500px;
    width: 500px;
    border: 1px solid gray;
  }
line {
  shape-rendering: crispEdges;
  stroke: #000000;
  }

line.minor  {
  stroke: #777777;
  stroke-dasharray: 2,2;
}

path.domain {
  fill: none;
  stroke: black;
}

</style>
<body>

<div id="viz">
  <svg>
  </svg>
</div>
</body>
  <footer>
    
<script>
d3.csv("boxplot.csv", scatterplot)

function scatterplot(data) {
    xScale = d3.scale.linear().domain([1,8]).range([20,470]);
    yScale = d3.scale.linear().domain([0,100]).range([480,20]);

yAxis = d3.svg.axis()
.scale(yScale)
.orient("right")
.ticks(8)
.tickSize(-470)
.tickSubdivide(true);
    
d3.select("svg").append("g")
.attr("transform", "translate(470,0)")
.attr("id", "yAxisG")
.call(yAxis);

xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.tickSize(-470)
.tickValues([1,2,3,4,5,6,7]);

d3.select("svg").append("g")
.attr("transform", "translate(0,480)")
.attr("id", "xAxisG")
.call(xAxis);

d3.select("svg").selectAll("circle.median")
.data(data)
.enter()
.append("circle")
.attr("class", "tweets")
.attr("r", 5)
.attr("cx", function(d) {return xScale(d.day)})
.attr("cy", function(d) {return yScale(d.median)})
.style("fill", "darkgray");

d3.select("svg").selectAll("g.box")
.data(data)
.enter()
.append("g")
.attr("class", "box")
.attr("transform", function(d) {return "translate(" + xScale(d.day) +"," + yScale(d.median) + ")"})
.each(function(d,i) {
d3.select(this)
.append("line")
.attr("class", "range")
.attr("x1", 0)
.attr("x2", 0)
.attr("y1", yScale(d.max) - yScale(d.median))
.attr("y2", yScale(d.min) - yScale(d.median))
.style("stroke", "black")
.style("stroke-width", "4px");

d3.select(this)
.append("line")
.attr("class", "max")
.attr("x1", -10)
.attr("x2", 10)
.attr("y1", yScale(d.max) - yScale(d.median))
.attr("y2", yScale(d.max) - yScale(d.median))
.style("stroke", "black")
.style("stroke-width", "4px");

d3.select(this)
.append("line")
.attr("class", "min")
.attr("x1", -10)
.attr("x2", 10)
.attr("y1", yScale(d.min) - yScale(d.median))
.attr("y2", yScale(d.min) - yScale(d.median))
.style("stroke", "black")
.style("stroke-width", "4px");
d3.select(this)
.append("rect")
.attr("class", "range")
.attr("width", 20)
.attr("x", -10)
.attr("y", yScale(d.q3) - yScale(d.median))
.attr("height", yScale(d.q1) - yScale(d.q3))
.style("fill", "white")
.style("stroke", "black")
.style("stroke-width", "2px");

d3.select(this)
.append("line")
.attr("x1", -10)
.attr("x2", 10)
.attr("y1", 0)
.attr("y2", 0)
.style("stroke", "darkgray")
.style("stroke-width", "4px");
})

}

</script>
  </footer>

</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js