D3 Examples - Trellis Plot (d3)

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<!DOCTYPE html>
<meta charset="utf-8">
<style> 
​
  .bar { fill: steelblue;
      }
​
</style>
<body>
    
<script src="//d3js.org/d3.v4.min.js"></script>
<script>
​
// Set graph dimensions and margins
var margin = {top: 50, right: 20, bottom: 110, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
​
var targetYear = "2004";
var targetLabel1 = "ATL";
var targetLabel2 = "BOS";
var targetLabel3 = "LAX";
​
// Set ranges
var x = d3.scaleBand()
          .range([0, width / 12])
          .padding(0.1);
var x2 = d3.scaleBand()
          .range([0, width])
          .padding(0.1);
var y = d3.scaleLinear()
          .range([height - 20, 0]);
          
// Appends an svg to the body and a group which is moved to the top left margin
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 + ")");
​
// Get data
d3.csv("airlines.csv", function(error, data) {
  if (error) throw error;
​
  var newData = data.filter(function filterCriteria(d) {
    return ((d.Code == targetLabel1) || (d.Code == targetLabel2)
      || (d.Code == targetLabel3)) && (d.Year == targetYear);
  })
  // Format data
  newData.forEach(function(d) {
    d.Code = d.Code;
    d.Delayed = +d.Delayed;
    d.Month = +d.Month;
    d.MonthName = d.MonthName;
  });
    
  // Scale the range of the data in the domains
  x.domain(newData.map(function(d) { return d.Code; }));
  x2.domain(newData.map(function(d) {
    return d.MonthName;
  }))
  y.domain([0, d3.max(newData, function(d) { return d.Delayed; })]);
​
  // Append rectangles for the bar chart
  svg.selectAll(".bar")
      .data(newData)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) {
        return x(d.Code) + ((width / 12) * (d.Month - 1));
      })
      .attr("width", x.bandwidth())
      .attr("y", function(d) { return y(d.Delayed); })
      .attr("height", function(d) { return height - y(d.Delayed) - 20; });
​
  // X Axis
  var i;
​
  for (i = 0 ; i < 12 ; i ++) {
     svg.append("g")
      .attr("transform", "translate(" + ((width / 12) * i) + "," + (height - 20) + ")")
      .call(d3.axisBottom(x))
      .selectAll("text") 
     .style("text-anchor", "middle")
        .attr("dx", ".0em")
  .style("font-size", "12px") 
        .attr("dy", ".75em");
  }
​
  svg.append("g")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x2))
      .selectAll("text")
      .style("text-anchor", "middle")
      .attr("dx", ".0em")
      .style("font-size", "14px")
      .attr("dy", ".75em");
​
  // Y Axis
  svg.append("g")
      .call(d3.axisLeft(y));
​
  // Make a title
  svg.append("text")
      .attr("x", (width / 2))
      .attr("y", 0 - (margin.top / 2))
      .attr("text-anchor", "middle")
      .style("font-size", "20px")
      .text("Number of Delayed Flights in " + targetYear);
​
});
​
</script>
</body>
​
    