README.md

d3.unconf example gist. Fork it here.

data.json

[
  {
    "day":1,
    "hour":1,
    "value":16
  },
  {
    "day":1,
    "hour":2,
    "value":20
  },
  {
    "day":1,
    "hour":3,
    "value":0
  },
  {
    "day":1,
    "hour":4,
    "value":0
  },
  {
    "day":1,
    "hour":5,
    "value":0
  },
  {
    "day":1,
    "hour":6,
    "value":2
  },
  {
    "day":1,
    "hour":7,
    "value":0
  },
  {
    "day":1,
    "hour":8,
    "value":9
  },
  {
    "day":1,
    "hour":9,
    "value":25
  },
  {
    "day":1,
    "hour":10,
    "value":49
  },
  {
    "day":1,
    "hour":11,
    "value":57
  },
  {
    "day":1,
    "hour":12,
    "value":61
  },
  {
    "day":1,
    "hour":13,
    "value":37
  },
  {
    "day":1,
    "hour":14,
    "value":66
  },
  {
    "day":1,
    "hour":15,
    "value":70
  },
  {
    "day":1,
    "hour":16,
    "value":55
  },
  {
    "day":1,
    "hour":17,
    "value":51
  },
  {
    "day":1,
    "hour":18,
    "value":55
  },
  {
    "day":1,
    "hour":19,
    "value":17
  },
  {
    "day":1,
    "hour":20,
    "value":20
  },
  {
    "day":1,
    "hour":21,
    "value":9
  },
  {
    "day":1,
    "hour":22,
    "value":4
  },
  {
    "day":1,
    "hour":23,
    "value":0
  },
  {
    "day":1,
    "hour":24,
    "value":12
  },
  {
    "day":2,
    "hour":1,
    "value":6
  },
  {
    "day":2,
    "hour":2,
    "value":2
  },
  {
    "day":2,
    "hour":3,
    "value":0
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  {
    "day":2,
    "hour":4,
    "value":0
  },
  {
    "day":2,
    "hour":5,
    "value":0
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  {
    "day":2,
    "hour":6,
    "value":2
  },
  {
    "day":2,
    "hour":7,
    "value":4
  },
  {
    "day":2,
    "hour":8,
    "value":11
  },
  {
    "day":2,
    "hour":9,
    "value":28
  },
  {
    "day":2,
    "hour":10,
    "value":49
  },
  {
    "day":2,
    "hour":11,
    "value":51
  },
  {
    "day":2,
    "hour":12,
    "value":47
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  {
    "day":2,
    "hour":13,
    "value":38
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  {
    "day":2,
    "hour":14,
    "value":65
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  {
    "day":2,
    "hour":15,
    "value":60
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  {
    "day":2,
    "hour":16,
    "value":50
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  {
    "day":2,
    "hour":17,
    "value":65
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  {
    "day":2,
    "hour":18,
    "value":50
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  {
    "day":2,
    "hour":19,
    "value":22
  },
  {
    "day":2,
    "hour":20,
    "value":11
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  {
    "day":2,
    "hour":21,
    "value":12
  },
  {
    "day":2,
    "hour":22,
    "value":9
  },
  {
    "day":2,
    "hour":23,
    "value":0
  },
  {
    "day":2,
    "hour":24,
    "value":13
  },
  {
    "day":3,
    "hour":1,
    "value":5
  },
  {
    "day":3,
    "hour":2,
    "value":8
  },
  {
    "day":3,
    "hour":3,
    "value":8
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  {
    "day":3,
    "hour":4,
    "value":0
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  {
    "day":3,
    "hour":5,
    "value":0
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  {
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    "hour":6,
    "value":2
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  {
    "day":3,
    "hour":7,
    "value":5
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  {
    "day":3,
    "hour":8,
    "value":12
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  {
    "day":3,
    "hour":9,
    "value":34
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  {
    "day":3,
    "hour":10,
    "value":43
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  {
    "day":3,
    "hour":11,
    "value":54
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  {
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    "hour":12,
    "value":44
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  {
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    "hour":13,
    "value":40
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  {
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    "hour":14,
    "value":48
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  {
    "day":3,
    "hour":15,
    "value":54
  },
  {
    "day":3,
    "hour":16,
    "value":59
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  {
    "day":3,
    "hour":17,
    "value":60
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  {
    "day":3,
    "hour":18,
    "value":51
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  {
    "day":3,
    "hour":19,
    "value":21
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  {
    "day":3,
    "hour":20,
    "value":16
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  {
    "day":3,
    "hour":21,
    "value":9
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  {
    "day":3,
    "hour":22,
    "value":5
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  {
    "day":3,
    "hour":23,
    "value":4
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  {
    "day":3,
    "hour":24,
    "value":7
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  {
    "day":4,
    "hour":1,
    "value":0
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  {
    "day":4,
    "hour":2,
    "value":0
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  {
    "day":4,
    "hour":3,
    "value":0
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    "day":4,
    "hour":4,
    "value":0
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    "hour":5,
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    "hour":7,
    "value":4
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    "hour":8,
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    "hour":9,
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  {
    "day":4,
    "hour":10,
    "value":58
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    "hour":11,
    "value":61
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    "hour":12,
    "value":59
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    "hour":13,
    "value":53
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    "hour":14,
    "value":54
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    "hour":15,
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    "hour":16,
    "value":55
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  {
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    "hour":17,
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  {
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    "value":53
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    "hour":19,
    "value":18
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  {
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    "hour":20,
    "value":3
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  {
    "day":4,
    "hour":21,
    "value":9
  },
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    "value":12
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    "hour":23,
    "value":2
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    "hour":24,
    "value":8
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  {
    "day":5,
    "hour":1,
    "value":2
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  {
    "day":5,
    "hour":2,
    "value":0
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  {
    "day":5,
    "hour":3,
    "value":8
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  {
    "day":5,
    "hour":4,
    "value":2
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  {
    "day":5,
    "hour":5,
    "value":0
  },
  {
    "day":5,
    "hour":6,
    "value":2
  },
  {
    "day":5,
    "hour":7,
    "value":4
  },
  {
    "day":5,
    "hour":8,
    "value":14
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  {
    "day":5,
    "hour":9,
    "value":31
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  {
    "day":5,
    "hour":10,
    "value":48
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  {
    "day":5,
    "hour":11,
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    "hour":12,
    "value":50
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  {
    "day":5,
    "hour":13,
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    "day":5,
    "hour":14,
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  {
    "day":5,
    "hour":15,
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  {
    "day":5,
    "hour":17,
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  {
    "day":5,
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    "day":5,
    "hour":19,
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    "hour":20,
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    "hour":22,
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    "hour":24,
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  {
    "day":6,
    "hour":2,
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  {
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    "hour":3,
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  {
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    "hour":4,
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    "hour":5,
    "value":0
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    "day":6,
    "hour":6,
    "value":0
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    "hour":7,
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  {
    "day":6,
    "hour":8,
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  {
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    "hour":9,
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  {
    "day":6,
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    "hour":12,
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    "hour":13,
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  {
    "day":6,
    "hour":14,
    "value":14
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    "day":6,
    "hour":15,
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    "hour":16,
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  {
    "day":6,
    "hour":17,
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    "hour":18,
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    "day":6,
    "hour":19,
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  {
    "day":6,
    "hour":20,
    "value":0
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  {
    "day":6,
    "hour":21,
    "value":0
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  {
    "day":6,
    "hour":22,
    "value":0
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  {
    "day":6,
    "hour":23,
    "value":0
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    "day":6,
    "hour":24,
    "value":0
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  {
    "day":7,
    "hour":1,
    "value":7
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    "day":7,
    "hour":2,
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  {
    "day":7,
    "hour":3,
    "value":0
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  {
    "day":7,
    "hour":4,
    "value":0
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  {
    "day":7,
    "hour":5,
    "value":0
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  {
    "day":7,
    "hour":6,
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  {
    "day":7,
    "hour":7,
    "value":0
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  {
    "day":7,
    "hour":8,
    "value":0
  },
  {
    "day":7,
    "hour":9,
    "value":0
  },
  {
    "day":7,
    "hour":10,
    "value":0
  },
  {
    "day":7,
    "hour":11,
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  {
    "day":7,
    "hour":12,
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  {
    "day":7,
    "hour":13,
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  {
    "day":7,
    "hour":14,
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  {
    "day":7,
    "hour":15,
    "value":0
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  {
    "day":7,
    "hour":16,
    "value":4
  },
  {
    "day":7,
    "hour":17,
    "value":0
  },
  {
    "day":7,
    "hour":18,
    "value":2
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  {
    "day":7,
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    "value":10
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  {
    "day":7,
    "hour":20,
    "value":7
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  {
    "day":7,
    "hour":21,
    "value":0
  },
  {
    "day":7,
    "hour":22,
    "value":19
  },
  {
    "day":7,
    "hour":23,
    "value":9
  },
  {
    "day":7,
    "hour":24,
    "value":4
  }
]

index.html

<!DOCTYPE html>
<html class="no-js">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title></title>
    <meta name="description" content="">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.4.2/d3.min.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3-tip/0.6.3/d3-tip.min.js"></script>
    <style type="text/css" media="screen">
      body {
        position: relative;
      }

      svg,
      canvas {
        position: absolute;
      }

      .axis text {
        font: 10px sans-serif;
      }

      .axis path,
      .axis line {
        fill: none;
        stroke: #000;
        shape-rendering: crispEdges;
      }

      .axis path {
        display: none;
      }
    </style>
  </head>
  <body>
    <div id="chart">

    </div>
    <script src="js/main.js"></script>
  </body>
</html>

main.js

var margin = { top: 50, right: 0, bottom: 100, left: 30 },
  width = 960 - margin.left - margin.right,
  height = 430 - margin.top - margin.bottom,
  gridSize = Math.floor(width / 24),
  legendElementWidth = gridSize*2,
  buckets = 9,
  // http://colorbrewer2.org/?type=diverging&scheme=PiYG&n=9
  colors = ['rgb(197,27,125)','rgb(222,119,174)','rgb(241,182,218)','rgb(253,224,239)','rgb(247,247,247)','rgb(230,245,208)','rgb(184,225,134)','rgb(127,188,65)','rgb(77,146,33)'],
  days = ["Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
  times = ["1a", "2a", "3a", "4a", "5a", "6a", "7a", "8a", "9a", "10a", "11a", "12a", "1p", "2p", "3p", "4p", "5p", "6p", "7p", "8p", "9p", "10p", "11p", "12p"];


d3.json("data.json",
  function(error, data) {
    console.log("data",data);
    var colorScale = d3.scale.quantile()
        .domain([0, buckets - 1, d3.max(data, function (d) { return d.value; })])
        .range(colors);

    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 + ")");

    var dayLabels = svg.selectAll(".dayLabel")
        .data(days)
        .enter().append("text")
          .text(function (d) { return d; })
          .attr("x", 0)
          .attr("y", function (d, i) { return i * gridSize; })
          .style("text-anchor", "end")
          .attr("transform", "translate(-6," + gridSize / 1.5 + ")")
          .attr("class", function (d, i) { return ((i >= 0 && i <= 4) ? "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", function(d, i) { return i * gridSize; })
          .attr("y", 0)
          .style("text-anchor", "middle")
          .attr("transform", "translate(" + gridSize / 2 + ", -6)")
          .attr("class", function(d, i) { return ((i >= 7 && i <= 16) ? "timeLabel mono axis axis-worktime" : "timeLabel mono axis"); });

    var heatMap = svg.selectAll(".hour")
        .data(data)
        .enter().append("rect")
        .attr("x", function(d) { return (d.hour - 1) * gridSize; })
        .attr("y", function(d) { return (d.day - 1) * gridSize; })
        .attr("class", "hour bordered")
        .attr("width", gridSize)
        .attr("height", gridSize)
        .style("stroke", "#fff")
        .style("fill", colors[0]);

    heatMap.transition().duration(1000)
        .style("fill", function(d) { return colorScale(d.value); });

    heatMap.append("title").text(function(d) { return d.value; });

    var legend = svg.selectAll(".legend")
        .data([0].concat(colorScale.quantiles()), function(d) { return d; })
        .enter().append("g")
        .attr("class", "legend");

    legend.append("rect")
      .attr("x", function(d, i) { return legendElementWidth * i; })
      .attr("y", height)
      .attr("width", gridSize * 2)
      .attr("height", gridSize / 2)
      .style("fill", function(d, i) { return colors[i]; });

    legend.append("text")
      .attr("class", "mono")
      .text(function(d) { return "≥ " + Math.round(d); })
      .attr("x", function(d, i) { return legendElementWidth * i; })
      .attr("y", height + gridSize);
});