D3 Examples - Day / Hour Heatmap

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<!DOCTYPE html>
<meta charset="utf-8">
<html>
  <head>
    <style>
      rect.bordered {
        stroke: #E6E6E6;
        stroke-width:2px;   
      }
​
      text.mono {
        font-size: 9pt;
        font-family: avenir, avenir;
        fill: #aaa;
      }
​
      text.axis-workweek {
        fill: #000;
      }
​
      text.axis-worktime {
        fill: #000;
      }
    </style>
    <script src="https://d3js.org/d3.v3.js"></script>
  </head>
  <body>
    <div id="chart"></div>
    
    <script type="text/javascript">
      var margin = { top: 112, right: 2, bottom: 78, left: 73 },
          width = 960 - margin.left - margin.right,
          height = 500 - margin.top - margin.bottom,
          gridSize = Math.floor(width / 8),
          legendElementWidth = gridSize/15,
          buckets = 10,
          colors = ["#f7fcf0","#e0f3db","#ccebc5","#a8ddb5",
                    "#7bccc4","#4eb3d3","#2b8cbe","#08589e"], 
   
          days = ["Sunday","Monday", "Tuesday", 
                  "Wednesday", "Thursday", "Friday", "Saturday"],
          
          times = ["12am","1a", "2a", "3a", "4a", "5a", "6a",
                   "7a", "8a", "9a", "10a", "11a", "12pm", "1p",
                   "2p", "3p", "4p", "5p", "6p", "7p", "8p",
                   "9p", "10p", "11p"];
​
      var svg = d3.select("#chart").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 + ")");
      
      svg.append("text")
        .attr("x", -65)
        .attr("y", -84)
        .attr("dy", "0.6532em")
        .text("SFPD Incidents by Hour and Day of Week")
        .style("font", "25px avenir")
        .style("fill", "#000000");
      
        svg.append("text")
        .attr("x", 380)
        .attr("y", -50) 
        .attr("dy", "1.2496em")
        .text("Date")
        .style("font", "12px avenir")
        .style("fill", "#000000");
      
        svg.append("text")
        .attr("x", -65)
        .attr("y", -20) 
        .attr("dy", "1.2496em")
        .text("Hour of Time")
        .style("font", "10px avenir")
        .style("fill", "#000000");
      
       svg.append("text")
      .attr("x", 0)
      .attr("y", 332)
      .attr("dy", "0em")
      .style("font", "12px avenir")
      .style("fill", "#000000")
      .text("This heatmap highlights the frequency in which indicidents take place at a certain time and day. The lower right portion of the map has a much ");
      
       svg.append("text")
      .attr("x", 0)
      .attr("y", 332)
      .attr("dy", "1em")
      .style("font", "12px avenir")
      .style("fill", "#000000")
      .text("darker hue than the rest of the visualization, depicting a  higher number of incidents. This group includes Thursday, Friday, and Saturday between");
      
       svg.append("text")
      .attr("x", 0)
      .attr("y", 332)
      .attr("dy", "2em")
      .style("font", "12px avenir")
      .style("fill", "#000000")
      .text("working hours (bolded) .");
      
      svg.append("text")
      .attr("x", 0)
      .attr("y", 332)
      .attr("dy", "4em")
      .style("font", "12px avenir")
      .style("fill", "#000000")
      .text("By Anaelia Ovalle")
      .style("font-weight", "bold");
      
      
     
      var dayLabels = svg.selectAll(".dayLabel")
          .data(days)
          .enter().append("text")
            .text(function (d) { return d; })
            .attr("x", function(d, i) { return i * gridSize; })
            .attr("y", 0)
            .style("text-anchor", "middle")
            .attr("transform", "translate(60," + gridSize/-10 + ")")
            .attr("class", "dayLabel mono axis")
            .attr("class", function(d, i) { return ((i == "Sunday" || i == "Saturday") ? "dayLabel mono axis axis-workweek" : "dayLabel mono axis"); });
​
      
      var timeLabels = svg.selectAll(".timeLabel")
          .data(times)
          .enter().append("text")
            .text(function(d) { return d; })
            .attr("x", -9)
            .attr("y", function (d, i) { return i * gridSize/8.5; }) 
                .attr("dy", "1.05em")
            .style("text-anchor", "end")
                     .attr("class", function(d, i) { return ((i >= 7 && i <= 17) ? "timeLabel mono axis axis-worktime" : "timeLabel mono axis"); });
​
      var heatmapChart = function(csvFile) {
        d3.csv(csvFile,
        function(d) {
          return {
            day: +d.day,
            hour: +d.hour,
            value: +d.value
          };
        },
               
               
        function(error, data) {
          var colorScale = d3.scale.quantile()
              .domain([0, buckets-1, d3.max(data, function (d) { return d.value; })])
              .range(colors);
​
          var cards = svg.selectAll(".hour")
              .data(data, function(d) {return d.hour+':'+d.day;});
​
          cards.append("title");
​
          cards.enter().append("rect")
              .attr("x", function(d) { return (d.day-1) * gridSize; })                              .attr("y", function(d) { return (d.hour ) * gridSize/8.5; })
                .attr("class", "hour bordered")
              .attr("width", gridSize)
              .attr("height", height/24)
              .style("fill", colors[0]);
​
          cards.transition().duration(1000)
              .style("fill", function(d) { return colorScale(d.value); });
​
          cards.select("title").text(function(d) { return d.value; });
          
          cards.exit().remove();
​
          var legend = svg.selectAll(".legend")
              .data([0].concat(colorScale.quantiles()), function(d) { return d; });
​
          legend.enter().append("g")
              .attr("class", "legend");
​
          legend.append("rect")
            .attr("x", function(d, i) { return legendElementWidth * i; })
            .attr("y", 0)
            .attr("width", legendElementWidth)
            .attr("height", gridSize / 7)
            .attr("transform", "translate(" + 790 + "," + 0+ ")")
            .style("fill", function(d, i) { return colors[i]; });
​
          legend.append("text")
            .attr("x",782)
            .attr("y",-5)
            .text("Number of Records")
            .style("font", "10px avenir")
                .style("fill", "#000000");
          legend.append("text")
            .attr("x",780)
            .attr("y",11)
            .text(0)
            .style("font", "10px avenir")
                .style("fill", "#000000");
          
          legend.append("text")
            .attr("x",855)
            .attr("y",11)
            .text("161")
            .style("font", "10px avenir")
                .style("fill", "#000000");
​
          legend.exit().remove();
​
        });  
      };
​
      heatmapChart("new_heat.csv");
      
    </script>
  </body>
</html>
    